Ranson had a vision but under SISU couldnt set out his plan. Hence the reason he resigned, rather than being sacked / dismissed.
Thorn is the best we can expect under the current regime. We could sack him and go for a 'proven' manager, but havent we done that before? Did it work? No.
Under the takeover, or if the takeover goes ahead (and due to the ongoing mumblings its safe to say there will be a takeover, albeit with no timescale at present) sacking Thorn would serve no purpose. We'd get someone else, who the new regime probably wont like (ala Dowie before SISU came), he'll get sacked with little fan pressure (hypothetically of course, this next manager might be crap and we might want him out and put pressure onto the new board / owners) and we'll be back to square one where the new regime bring in their own man, who cant get the players he wants until atleast the summer (ala Coleman).