I like your logic as the signings
Lacazette would be gettable and he will be off this summer
I really want sessegnon though as he is similar to rose whilst still needing to learn
I don't think they are unrealistic, its their contract situation that makes them gettable for us but we will have strong competition if we want those three players, especially the two big ones. Having said that, the project on offer to a potential signing has to be attractive with the ground, training complex, being in London etc. I think if we qualify for the CL again for a first time consecutively then it does send a statement to potential signings that we are serious players in this top 6 despite not quite having the resources that others have.
With those 3 signings I think you immediately enhance the first 11, never mind just the squad and you put pressure and competition into two areas of the team where currently we don't have any - On Eriksen and Kane. That to my mind can only be a good thing, especially if the two players coming in are Isco and Lacazette who are proven top level quality in European football terms.