Grunfeld could be quite useful, filling the gaps at SG/SF , doing all little things to win. He's ego-free , hardworking type of a guy , never forces things, always 'in the game's stream'. Sort of younger version of Burstein.
Rothbart with all his lousy defense is the best Israeli center right now ( Green is injured, Kuzi is about to retire ) . He probably can play some single digit minutes in EL behind Sofo/James, being a full time back-up in Adriatic & BSL to reduce a work-load on bigs. His Israeli passport gives Blatt more flexibility in BSL (if "The Russian Law" stays). Besides, watching how Sofo flourishes under Blatt, I hope this magic will work with Rothbart too .
Landesberg is talented as hell, and with Eidson taking on PG spot (Blatt won't make the same mistake wasting him @SF) . Maccabi needs a quick, athletic SF like Landesberg . That's the quality that other MTA SFs (Pnini & Bluth) lack . I hope you remember how many troubles were caused by athletic rivals' SFs : Anderson , SanEm, Sato. Regarding his contract, I guess he does want to join MTA , so the deal could be settled somehow with Haifa , even if it require Landesberg to pay a part of his buy-out by himself.
Ohayon could also be quite useful as a defensive stopper for special missions( e.g. to shut down rival guard) or as a back-up PG (Adriatic/BSL). There is a problem that Yogev is too associated with Jerusalem, but if Pnini did that without a problem, I guess Ohayon could do it too?