Might be outing myself now as completely Clueless, but I'll take the risk.
I understand that it sucks if its bugged when you have 8/8, but how big of an issue is it? As I see it there is stronger options in several slots than T2, making the T2 bonus obsolete. The bonus is good, but not amazing.
As I see it, you can at the most value it as 11 mp5 (the mana you save of not maintaining a rank 5 renew). That asumes you want to cast Gheal at perfect intervals, and not having another rank of it up.
As I think the stronger picks are more valueable than having the set bonus, is this an actual big problem?