The changes to the command subsystems and rebalancing of best bonuses toward the command ships has addressed most of the worst parts of T3's. But not all. And, just quickly, the multiple bonuses of the T3 subs now spreads the capabilities across 3 links instead of 1, so you get more though less extreme boosts, which really isn't a nerf it is flattening the curve. Hardly worth the QQ on the feedback thread.
I don't have a lot of problems with T3's as a rule, but there are some exceptions.
Lets take the Proteus. For example
this behemoth is a wee bit OTT. Granted you probably won't be dropping HG slaves in w-space on account of bubbles so you won't quite get carrier-level tank very often. Even so, something with 129K EHP, the sig of a squirrel and the gank of a BC.
That's off-piste, it is rabid dog territory. It needs some rebalancing even taking into account you have to drop a billion ISK on it to get the 'vanilla' all 5's performance envelope out of it. Its not like a billion ISK is hard to come by.
This opens up the whole price comparison argument. A billion ISK is a lot of money, you say, but this could take on any pirate BS any day of the week (in its role of camping gates; web+scram then get in at 500) solo, let alone with even a sole Execquror repping it to make it spazmo OTT.
Where should T3's be in terms of performance and ISK for performance? To my mind, probably not in the 200K EHP and 800 DPS and tiny sig space - you should have to compromise, not be able to do it all, better than anything else, all at once.
You will see these outliers trimmed out. That won't nerf them into oblivion, mind you. For instance, I would expect that for 750M ISK you'll get cloaky nullified T3's with 50-0K EHP tanks and 200-400 DPS. Or you'd go EWAR (ECMgu, web loki, neut legion, tackle prot) and EHP, or covops or command subs.
There also needs to be some buffs to some T3 and some subs. The RR sub, for instance, should get rep range to double the range of the transporter, to make it moderately useful for ships aside from RRGu's. The Proteus needs a decent drone bay and the loki needs better missile subs.
The end result should be that you lose the egregious monstrosities and the class remains potent, flexible, expensive and worthwhile. Also, refitting at POSs (but not carriers!) should be possible, to counteract any soft nerfs and allow J-space to be a place where you can reconfigure a T3 to adapt to a fluid tactical environment without having to have 4 different T3's.