The last two games are skewing the perception. In the first 3 games, he was very calm and was dissecting defenses (well maybe not the first half of the Cardinals game). In the last two games he has been skittish and bailing but I dont think it is much less or more than he has in the past under intense pressure.
The reasons have been hashed multiple times in other threads but when a pass play is called, he cannot see an open receiver due to our catchers not getting quick separation and also because there is an extra defender seemingly in his face within 2 seconds. It is easy to criticize Allen for not climbing the pocket but there needs to be one in the first place and deep enough to step into.
So, in general, he has looked off platform a lot in the last two games.
This of course comes with the caveat that my thoughts are based on TV feed only. And you and I could look at the exact same video and you would see a lot more.