Aribo should be 100% starting against Spurs. And I expect Lavia to start as well. I'd say it is a transition season. Aribo aside, our debutants will be very young. Fans shouldn't expect a huge amount from them straight away.Is it really a transition season though? We haven't sold anyone, and it is fairly standard for most teams in the league to be starting each new season with 3 or 4 new players in their team. I don't actually think - Bazunu aside - any of the new signings deserve to be starting against Spurs (maybe Aribo, and of course hopefully Mara if he plays well against Villarreal). Obviously I expect them all to play an increasingly important role as the season goes on, but it's not like we have an entirely new first team that needs to get to know each other.
This isn't 14/15 again when we'd just lost Lambert, Lallana, Lovren, Shaw and J-Rod (to injury). That was a proper transition season.