The impression I get (and it's only an impression, because this was during my prog hiatus) is that for a long time, Sinister Dexter got mired in an interminable ongoing plot and completely lost its way. For me, the original format was best - lots of one-shots, interspersed with longer stories that moved things forward, delivered with very regular frequency.
Edginton would avoid the perception as the guy who doesn't finish stuff if some (not all) of his stories felt more complete in their own right. Get an idea, do a complete 10 part story with it, come back to it later if there's more to say - if there isn't, it ends where it ends, with threads wrapped up. I appreciate that's easier for me to say than it is to actually do, and I understand the temptation to create labyrinthine epics where you're constantly planting seeds to flourish a decade later. But if you're not careful, you end up as Chris Claremont!