Yes I remember and you're point was a perfectly valid and well made one. I have a different view but it doesn't mean I'm right and you're wrong as we (like everyone else) are two guys on a football forum giving a view.
However, as a point of order, we did not try 4 CB's, loading the team with height and relying on set pieces in the same way. Or if we were trying that, then it would be a reall foolhardy plan, as you're leaving out our two biggest players.
I am quite happy to accept the point that 4 CB's my not work. That the 7 game run we've had is a bit of an abheration (and probably not quite long enough to generalise from, it's kind of on the boundary) and that if we play more games we get mean reversion. I'm very open to that theory, but it hasn't happened yet.
I'll be completely honest as well, I don't think Coleman is good enough anymore. I try to avoid writing people off, and he's been a great servant, but thats where we are now. I'm not saying Godfrey or Holgate are good enough either but they are
1) Younger, 2) achieve better results and 3) (and this is just my opinion) better.
As for Mina, I'm not sure he's the solution to our defensive woes, he played midweek when we conceded 4. I do think he would help on set peices though, as he's very big and very good in the air. But the evidence doesn't really show any single change makes a big difference, it's more that when they have played together, the back 4 of Holgate, Mina, Keane and Godfrey have been very solid. At present I cant say that about any of our other back fours.
So I mean if we asre trying the same tactics as when we had 4 CB's (2 of them huge) with 2 smaller CB's and two full backs, that doesn't seem sensible to me at all. I think he tried to play a different way and failed. It's up to Ancelotti if he wants to use the rest of this season as a trial and error exercise, but me personally I would go back to what has worked best so far.