OK a few thoughts.
1) Thanks RS for your time trying to make it work - a thankless task and i think not a genuine reflection on his abilities elsewhere (as shown by decent results at Yeovil, Cardiff and Orient). Won't go down as a CCFC success but frankly few do, and the rot had set in long before he arrived. After the MV run of 6 losses in a row the writing was on the wall. That said, nobody can criticism firing him as a bad decision. All the best RS.
2) MR returning has been mooted by many including myself as a decent solution. Just today after the Slade news, it crossed my mind. Surprising he wasn't appointed in October but maybe TF genuinely though RS would be a better man for the situation? There were't many disagreeing with him on that one, in all fairness.
3) Despite point 2 above, this is clearly a surprise but I think for many Sky Blues fans, it will be a welcome one. It strikes me as an encouraging appointment and maybe improves our very slim chances of survival - if he can string together 3 wins before the cup final, who knows what sort of momentum could be built?
4) Welcome back MR. Clearly, as with Eric Black, nobody who leaves us to take a step up / is wrongfully fired is allowed to be forgotten - clearly we need to see MR fail so we can all get closure =)
5) Don't believe any of the assertions you read about how this means SISU are likely to go. He was offered more money and a higher level of football by Huddersfield, and took it while the going was good. Yes we were facing uncertain times back in 2013 (how times have changed!) but that was the background, not the reason he left. There's likely no connection with the ownership at all.
6) Although I do find the appointment encouraging, I do sadly feel like it won't work out as well for him/us as it did in 2012/13. The right intent is there from TF to get MR back, which is good, but as for MR himself I can't see him being a shit hot success for us twice.