The Europe League will be crucial to get some of the new players integrated. I think Lamela is the only one of the new signings that will walk straight in to the XI after the international break. Chiriches and Eriksen will be eased in to the team through the cup games IMO.
Some serious selection headeaches for AVB:
Kaboul or Dawson
Capoue or Sandro
2 of Dembele, Paulinho, Holtby, Eriksen & Sigurdsson
2 of Lamela, Townsend, Lennon, Chadli & Sigurdsson.
For once I don't actually have a preferred strongest XI, confusing in a very positive way.