I generally speaking don't really agree; Uematsu isn't much of an arranger or sequencer (even on FF7, people like Minoru Akao did much of the sequencing of Uematsu's compositions) and is more a visionary composer; I would like him to return if there's any requirement for new pieces, but if it's just a recreation of his old work with some rearranging, I'd be fine with him not being involved, to be honest. Takeharu Ishimoto has been building towards this with his excellent arrangements of Uematsu's work for the complilation.
I agree that Ishimoto is very capable and has done great work, but he has his own style. It will sound fantastic, but it will also sound different. Just like Shimomura, Hamauzu etc, they all have musical signatures and idiosyncrasies that you can identify even in their arrangements of others' work. Of course I'm getting into the nitty gritty but I think we all love the original feel of the game. One thing I'm all for however, as long as they do homage to Nobuo's work appropriately, is building a new image and sound entirely with this game, which is the most likely scenario.
As long as he's at least supervising, and they use real instruments this time (what the hell were they thinking with FFX), I think everything will be fine
I agree my friend, unfortunately there's only one thing that's gets associated with synths, and that's a low budget/lack of resources. For instance, if Star Wars had synths... Well, yeah. I wouldn't be quite the same. People forget that it wasn't an artistic choice to work with synths, it was a limitation, and Nobuo has said as much. I do trust in whatever they do though, since they seem to really be putting time and quality into this project; they must know what it carries.