If Matip is back in action I'd like to see Klavan next to Gomez in the replay. I think he would benefit playing next to a specialist centre back, if that is his future path rather than back up left back.
Absolutely. Or for Gomez to start and then be replaced by Lucas.
For differing reasons, Gomez and Lucas can't currently complete 90 minutes at their best level. You could see them tailing off badly in the second half, and both making tired mistakes.
The first from Gomez that almost set up a one on one (but for Stewart's intelligent reading, positioning and tackle) and the second from Lucas passing straight to them, which gifted them a counter. A shot at goal that they should have done better with.
Thought it was quite lax leaving them both on, but probably a calculated gamble (since it was obvious it would happen even before the game) that the subs could score