Reigns is a better option than Lashley, surely....Lashley has the personality of one of Hacksaw Jim Dugan's 2x4s. Reigns cops a lot of hate, but he's got more personality than Lashley and is better in the ring than Strowman. I'm not a huge fan, but I don't get that hate.
They should just put the title on Reigns, turn him heel and have Rollins chase him....that's their best option in terms of direction for the universal title, IMO. Strowman has a year to cash in....no need to rush it. But a face Reigns as champ just won't work.