Thanks, I might give the Diplo replays a look. I don't think it's been that long, so I'd think the biggest changes are those in Rebellion. 
Though I've gotten around and tried a 1v1 against an Unfair TEC Rebel (Random), with myself as a TEC Loyalist. What I've noticed so far is that at least the TEC Ankylon Titan is not nearly as game-changing as I thought, which is a relief. I really like it; the Titan is supporting the fleet, instead of the other way around.
Though my main concern is with Corvettes. Those little ships are really strong for their cost and fleet supply, and can attack everything in the game. In my fleet, they've completely replaced the LRFs as primary damage-dealers. Being able to handle SC and frigates is a huge benefit.
Otherwise, things seem pretty normal for TEC. My fleet is still primarily flak and Hoshis (As they were before I stopped online play), and the new Loyalist technologies seem really underwhelming. Has this been typical for online play, at least for TEC players?