It is not too early to worry but it is too late. 'It is what it is', and it is not going to change. The Panthers decided several weeks and possibly even several months ago that Bell would be the starting LT. Bell 'is who he is', and a large part of the success or failure of this season will be how he and the entire O-Line plays.
I will also say that Bell will need good play from his LG (Amini) who is coming back from a major injury. I sill believe that one of the reasons why Gross had such a great year last year was because his buddy Wharton played LG. Those two just worked well together, and it showed on the field.
If the Panthers could establish a running game (even an average running game) then the Cam chemistry to new WR's will be a much easier transition. Cam started in the NFL with very little practice with his WR's due to the lockout, and he played 'lights out' his first few games. The Panthers need a healthy Stewart and Tolbert to ground & pound.
Remember - The Seattle Seahawks won the SuperBowl with less than great WR's. Golden Tate was their best WR in 2013 and he only had 64 catches for 848 yards with 5 TD's. These stats are comparable to Greg Olsen's stats.
The Seahawks won with a strong running game (Lynch had over 1,200 yards), very good special teams, and an outstanding defense.
Even with losing Captain, Mitchell, Mikell, and Florence, the Panthers will still have one of the best defenses in the NFL. Gano proved to be a very reliable kicker, and Nortman progress nicely as a punter. They still have very capable RB's with Williams, Stewart, and Tolbert. If they can fix the o-line there is no reason why the Panthers can't have a very strong running game and this will complements their defense.
To me, the biggest weakness is the o-line. They need to solidify all positions except Center & possibly LG unless Amini comes back strong.
They will add WR's through the draft and free agency. They don't need a superstar WR to win....just look at the 2013 Seahawks.
Let's remember the non-call 'leg whip' on Charles Johnson that took him out of the game for several series. That would have been a huge penalty on the Patriots. If that penalty had been called, the Patriots probably would not have scored their first touchdown. No way Gronk would have caught that ball.....the refs made the right call in picking up the flag.
Gross, Wharton, and Kalil have been solid. On a side note, Evan Mathis was a 3rd round draft pick for the Panthers in 2005. He has turned into a very good guard. It's too bad we didn't let him develop.....we sure could use him now.
Should have kept Anderson, and let Beason go. Beason was great prior to getting hurt, but has not played up to his 100% in nearly 2-years. Unfortunately, his story could end up similar to another great MLB that Beason was picked to replace. When Morgan was healthy, he was one of the best MLB in the NFL. Beason replaced him.