First off, I never agree with anything that Hawk says as it's pure idiocy. However, the b/u PG is an important position for the Bulls to consider in the near future, imo. Yes, the Bulls have plugged in b/u PG's with ease as you say, but they have mostly been tough scoring puch type of PG's.
The other side of it, we never know the accountability of Rose, unfortunately. When Rose is healthy, we have one of the best PG's, period, but he hasn't proven to be a sure thing, unfortunately. I think the Bulls need to consider bringing in a PG that could be an eventual replacement for Rose.
If Rose goes down again, he needs to be able to step in and run the offense like a real PG, imo. Personally, I'd like a lockdown defender, that can dish 10 assists in a game, but can still score a little bit. It probably would be good to be able to play PG and SG as well.
I really like a player like Patrick Beverly for Houston. If the Bulls could bring in a player that is similar to that, that can b/u at the PG and SG spots that would be perfect. I think it's imperative that the Bulls find a PG moving forward that can step in if Rose goes down again and not miss a beat at running the offense.
In a perfect world, the Bulls would add a PG like this, and then a starter at the 2/3 spots as you say, that can create, score and defend.