hm, while Sanchez is obviously better, Cuadrado seem to fit us better (position wise, not quality) he is better and more used wide in the 3-5-2. Sanchez can play in the 3-5-2 too but as an SS (we have Tevez already there) and Cuadrado would be an improvement over Licht as a RWB. also, Cuadrado can play as a winger in a 4-4-2 (this would mean no Pirlo but also both Tevez and Llorente in their natural roles).... there is also the posibility that Conte likes him more and wanted him for a long time. and Cuadrado is also a quality player, its not like its either a Di Maria level or a Biabiany level player. the gap between Cuadrado and Sanchez isnt that big.
as for Janmaat, if he comes, then Caceres will be used as a CB definetly. we would have Chiellini-Barzagli and Bonucci-Caceres. in this situation Ogbonna might be the one to be moved out wide. he has done a good job there against Real Madrid and maybe Conte would trust him there more (backup LB) that in the middle.
i would ask @Mark about the Mandzukic/Balotelli part but he would answer with "

" anyway so there is no point in that
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Lamela would be awesome. maybe we can get him on a loan + option to buy. he didnt play more that 10 games this season i think so i see no piont for Tottenham to keep him...