I have not played MW2e, perhaps unfortunately!
My impression of the Tactical Addendum was something like "BattleTech and AToW's rules are complicated enough, why do I need to learn a new rules set to hybridize them?" So I'm not the best person to ask, but I thought that I'd share this perspective anyway since no one else has replied. <_>
Personally, I'd use Alpha Strike's rules if I needed to do miniatures combat in AToW. On mech scale, anyway. It'd probably be more fun, and more accessible to newbies and busy people, than anything based on the BattleTech board game's rules.