I think he's really good but would only want him if he doesn't mind being rotated a lot for the rest of the season. I think we should try develop the players we're going to have long term before giving games to a player on loan.
Although in a big game I'd have Wijnaldum ahead of all our midfielders except Thiago, Henderson and Fabinho. And I'd probably have him on par with them 3 for big games. Klopp picked Wijnaldum ahead of Thiago against Madrid twice last season.