The time travel component makes it a very different situation. Wally even stresses that he isn't going to go back in time in the issue. Even so, I'm not sure the Lazarus Contract is the best story to use to inform who Wally is as a character.
That's pessimism talking though. Williamson hasn't done anything to really make us believe he doesn't have Wally's best interests at heart. I doubt he's going to hold Wally to a different standard here than he did Barry in Perfect Storm. I wouldn't let what might be ruin your enjoyment of what is.