It might suck to see Wally go, considering he wasn’t getting much face time on The Flash prior to joining the series, but if his exit means Jefferson would be back in the saddle, most Legends of Tomorrow fans would likely choose to cope with the speedster’s exit.
Not that Wally would be the only candidate for removal, if that would happen.
Of course, that might mean one of the new members would have to hit the road, as not to overpopulate, which could make sense of Brandon Routh’s recent comment about Wally West only temporarily being a part of the team, even though Keiynan Lonsdale was added as a regular.