Lashley is a horrible choice, he has the charisma of a drowned rat. As a bodyguard yep go for it as a world champion? How about no.
I've always been ok with Bobby Lashley and his work, not some big fan of him, but still I think he's a good talented wrestler, who's still in tremendous shape btw.
Why TNA did this? Simply, EY's time as champ has passed. The ratings for his segments and matches in past two months since he's the champion have been abysmal, often lowest watched segments of Impact. EY had a decent run as the champ, but it was time to move on from him. Now who to put the title on? Heels: MVP hurt, it's too early for EC3, Magnus held it b4 EY, Bram just arrived, James Storm is still lost in the shuffle unfortunately, and Kenny King is not a championship material yet. That leaves only Lashley as the option. He's big, fit, true heavyweight, has a pretty decent and recognizable name value, MMA world knows him and so on. So all things considered, TNA did the right thing here. Heel should be holding the title through summer, so it fits in that category too.
Plenty of babyfaces to after him now: Bobby Roode, Samoa Joe, Austin Aries, Jeff Hardy, Gunner, Ken Anderson, hell even Bully Ray.
Plus I've been digging Lashley's work since he came back, he's been having some good stuff ever since. Yeah he might be lacking charisma and mic skills, but there's his pals MVP and King to fix that for him. Lashley should be nothing but a fine champ (at worst) if booked properly (and if survives Destination X).