While I agree the collective consensus of this sight doesn't mean anything, I think the general rationale is easy.
When MBob can get rid of the buyouts and make a competitive move, he will do so, until he can he will retain CBG.
With that said, he would basically have to make a decision next year as CBG will be down to 1 yr left on his contract. Frankly, the decision should be made this year whether to extend (with only 2 yrs left on the contract), but i doubt he does that.
This actually would be a good year to make a change if GT can swing the finances. You have a solid threesome coming in that should hold some appeal for a new coach willing to work hard to retain, and would likely have at least 4 schollies to give out in a very talented GA class of 2017 - which would be a relatively easy class to recruit as you get to sell your future vision, not past results as a brand new coach - which is why first yr coaches often have strong classes. if they are smart enough to hire the right assistants to get in the doors, they actually have an easier sell since it can be based less on past results and more on future ones.
Finally, i'll add that if Heyward leaves after this year i would strongly try to bring in 2 grad transfers (which would still leave 4 for 2017) with 1 guard and 1 post.