26 is pretty young for a keeper
I recognize he's played many many games, but he hadn't played any English-style games yet. I think the style of play in the PL is so different from the continent ... keepers are allowed to get roughed up quite a bit more and have to deal with more aerial bombardment. Iirc, Lloris wasn't noted for his prowess with crosses before.
Lloris is also a very different kind of keeper from what we're used to; he and Friedal are practically diametrical, while he's also more aggressive than Gomes. Coupled with our young and new-looking defense (ever-rotating LB, a 20-year-old Caulker, 22-year-old Walker, a new CB from a weaker league), I think it's good to take some time to build communication and familiarity within the back five. Even though Gomes's form was thankfully fantastic from the very start of our 2points8games season, it was because he was making brilliant last-ditch saves, not so much for marshalling our defense. There was just no communication at all.
I'm not saying Lloris doesn't already operate at a high level, I mean that his style is naturally going to mean an embarrassing flop from time to time. This was what Lyon fans were saying to my knowledge before he came, and I think that's to be expected. However the occasional flop doesn't erase the overall benefits of a more proactive keeper. Lloris's decision-making can only improve with time here too.