Not on last nights performance he isn't.
Lallana's been out all the season and was not match fit, a fully fit Lallana is a very good player.
The problem with Solanke & Ings is that they do not really fit into the way we play as a front 3, if it was the last 15 minutes and you need a goal its worth chucking them on, but 30 mins into the game at 0-0 I can see why Klopp didn't want to put 1 of them on, but preferred Lallana for his linking play and bolster midfield more rather than an out and out striker.
The problem is we had no real alternative on the bench for losing any of Mane, Firmino or Salah, which has been the problem all season, but until now we have got away with, that was when you needed someone like Fekir or Lemar on the bench ready to come on to replace Salah.