Guys like T-Mac are tough ones. Clearly a very good defensive player when he is engaged but he was rarely engaged during his best years because he had to carry so much offensively for his teams.
How does he change on a team with more offense around him? Do you get that extra defense? Or do you still dock him on defense because the year you selected he only gave half-effort?
I had T-Mac in the past and I gave him the benefit of the doubt as I did with a few other players. In hindsight, I think I ended up over-rating my team too much in the process .
Anyone, I don't know what you do with someone like that. That is one of the benefits of guys from winning teams. There is less ambiguity about what you get from then in a situation where the load is shared. You know what they bring and everyone else knows what they bring.
Without that you get people who will believe in T-Mac's (for example) defense improving and ones who don't.