It makes a difference, yes, whether you one fell swoop a series or do it in installments. Gaiden has profited from being intermittent, I think, but most series don't.

Most Ima stuff is only a tank or so, and it's light BL at that. Pleasant but not much resonance. However if they did Phantom Moon Mansion as being in the same vein as Cent Demons, that'd be a definite plus.