I've called him out on his BB%. He should be a strong bench player long term as he can play a bunch of roles. But lacks some plate skills to be a full time player.
Don't agree but whatever. I think he'll be be more than that.
Edit: it occurred to me that I should probably explain this in greater detail. These are his walk rates by month in the minors last season.
April - 3 BB in 93 PA or 3.2%
May - 8 BB in 112 PAs or 7.1%
June - 10 BB in 124 PAs or 8%
July - 4 BB in 34 PAs or 11.7%
If you exclude his really slow start in april he was 22 BB in 270 or 8.1% walk rate. For Licey in the DWL he had 7 bb in 68 ABs(they don't list PA and I don't feel like hunting) which is roughly 10.3%. the DWL is roughly considered AAA competition. Also keep in mind he had a 10.9% rate in AA over 571 PAs. Obviously this is lessor competition than the majors. League average in terms of walk rate was 7.6% last season. Walk rate tends to be one of the few things that doesn't really decrease in the majors for players. For example, Rizzo had a 10.4% in his first AAA with the Padres(413 PAs) and a thus far in his career he has a 10.8% in the majors(1827). Rizzo was basically +/- 1% of that from A+ on. In terms of spring training, Alcantara had 5 BBs in 48 ABs(again stupid MLB uses ABs not PAs) or a 10.6% bb rate roughly. Given that I think it's pretty reasonable to expect Alcnatara to walk some where between 8-10%.
In terms of K rate, it looks like this
April - 20 k's in 93 PAs or 21.5%
May - 30 k's in 112 PAs or 26.8%
June - 26 k's in 124 or 21%
July - 7 k's in 34 PAs or 20.6%
That gave him a 22.7% for all of AAA though he was about 6 K's higher than normal in May. For Licey he had 15 K's in 68 ABs or roughly 22%. In Spring Training he had 16 in 48 ABs or roughly 33.3%. This coincides with his 31.0% in the majors last year. If we again use Rizzo as an example, he had 21.5% K rate for the Padres in his first AAA stint. He followed up with 30.1% for his first 153 PAs in the majors and currently sits at 19.2% for his career. Personally, I'd wager that Alcantara is closer to 21% K rate guy than 22%.
This is a list of every player who stole more than 20 bases while having a bb rate between 8-10.99%, and a k rate above 19% in the past 10 years.
2009 - Micheal Bourn - 9.3%/20.6% .285/.354/.384
2012 - Micheal Bourn - 10.0%/22.0% .274/.348/.391
2012 - Mike Trout - 10.5%/21.8% .326/.399/.564
2009 - B.J. Upton - 9.1%/24.3% .241/.313/.373
2010 - B.J. Upton - 11.0%/26.9% .237/.322/.424
2014 - B.J. Upton - 9.8%/29.7% .208/.287/.333
2006 - Alfonso Soriano - 9.2%/22.0% .277/.351/.560
2011 - Matt Kemp - 10.7%/23.1% .324/.399/.586
2011 - Emilio Bonifacio - 9.2%/20.1% .296/.360/.393
2010 - Drew Stubbs - 9.4%/28.8% .255/.329/.444
2011 - Drew Stubbs - 9.3%/30.1% .243/.321/.364
2012 - Desmond Jennings - 8.2%/21.3% .246/.314/.388
2013 - Desmond Jennings - 10.6%/19.1% .252/.334/.414
2010 - Andres Torres - 9.8%/22.5% .268/.343/.479
2013 - Brett Gardner - 8.5%/20.9% .273/.344/.416
2006 - Grady Sizemore - 10.4%/20.4% .290/.375/.533
2004 - Mike Cameron - 10.1%/25.4% .231/.319/.479
2011 - Austin Jackson - 8.4%/27.1% .249/.317/.374
2012 - Jason Heyward - 8.9%/23.3% .269/.335/.479
2014 - Christian Yelich - 10.6%/20.8% .284/.362/.402
2014 - Brett Gardner - 8.8%/21.1% .256/.327/.422
2012 - Hanley Ramirez - 8.1%/19.8% .257/.322/.437
2008 - Fred Lewis - 9.8%/23.8% .282/.351/.440
2012 - Shin-Soo Choo - 10.6%/21.9% .283/.373/.441
2012 - Andrew McCutchen - 10.4%/19.6% .327/.400/.553
2009 - Justin Upton - 9.4%/23.3% .300/.366/.532
2011 - Carlos Gonzalez - 8.9%/19.4% .295/.363/.526
2012 - Carlos Gonzalez - 9.7%/19.9% .303/.371/.510
2009 - Nelson Cruz - 9.5%/22.9% .260/.332/.524
2009 - Curtis Granderson - 10.1%/19.9% .249/.327/.453
The 5 worst OBP seasons on that list are 2014 Upton(.287), 2009 Upton(.313), 2012 Desmond Jennings(.314), 2011 Austin Jackson(.317), and 2004 Mike Cameron(.319). Keep in mind for a moment that .314 was last year's league average in OBP and also keep in mind that Alcantara stole 8 bases in 300 PAs which if you figure he gets 650 PAs with no change in stats would roughly be 17-18. If we narrow that focus to just 2B they averaged .250/.307/.364 last season.
The vast majority of players on that list hit in the .270/.340-.350 range which coincides well with the .271/.352/.451 Alcantara hit in AA. Also, of those players above, only 2011/12/13 Cargo, 2009 Granderson, 2009 Cruz, 2009 Justin Upton, 2012 McCutchen, 2012 Choo, 2012 Hanley, 2014 Gardner, 2012 Heyward, 2004 Cameron, 2006 Sizemore, 2010 Torres, 2011/12 Drew Stubbs, 2011 Kemp, 2006 Soriano, 2010 B.J. Upton, and 2012 Trout hit more than 15 HRs from that list which clearly Alcantara has the power for.
Additionally, it's not as though Alcantara looked bad defensively. He made a number of impressive plays last season. And while I wont tell you to rely on 209 innings worth of UZR he was a 24.0 UZR/150. Even if he's a third of that he's still well above average defensively.
Long story short, none of that screams bench player to me. I think he'll be a guy pretty close to his AA numbers. With a 132 wRC+ that'd put him third last season behind Cano(136) and Altuve(135) for 2B's with Neil Walker(130), Zobrist(119), Brian Dozier(118) and Howie Kendrick(115) being the only others above 115. I'd also point out that he batted .250/.315/.417 in ST with a 33% k rate so presuming his K rate does come down a .330-.340 OBP is well within reason.