I've always thought Sua-Filo was a bigger liability in pass protection than most fans thought, but he is good on run downs and anyone we have is going to get killed by Fletcher Cox.
I think the issue with La'el Collins was the transition to Paul Alexander's technique, I read several places that he was having more trouble than the others with the switch - and none of our guys really took to it anyway. I think with a full offseason in his old technique he will be fine, he was definitely above average at RT last year.
With Tyron and Martin its purely about injuries.