I miss Ivanova and Marcus :( No one can ever replace Ivanova, much like no one was able to replace a particular DS9 character.
In a way, my mind is cast back to season 2 when Sheridan joined, that worry of "is he really a nice guy like Sinclair?" (he was, of course, and despite some physical resemblance to Nick Clegg, one for standing by what he believes in), except it looks like this time Sheridan of all people has decided that a "nice" captain isn't required. We shall see!
A pretty grim start with killing off some poor kid.
And as for letting the telepaths stay - the irritating thing about the finale of season 4 is we already know how it turns out. JMS indicated that "knowing about the bomb under the dinner table while the guests are unaware" (or something like that) is his narrative style at this point, also deciding to introduce the prequel movie (and its spoilers) for new viewers. I think that's fair, but not to my personal tastes, I like surprises and unspoiled plot twists. That said, at least it being written that way is different to it being written as a secret and spoiled elsewhere.