I think the Texans wanted to save money on the OL by going from Brooks and Jones to Allen and Bergstrom
No, he played well enough here. He was diagnosed with the anxiety disorder about halfway through his first season there, so not getting dehydrated from puking up your guts the day before a game helps.
Yes, but we need to draft DBs even if we keep Joseph. We also need to draft OL and probably TE also. Not to mention general depth.