Would be interesting to see. In his first season when we played him there I generally remember him as being decent enough and a fairly consistent/reliable passer, but not particularly prone to taking risks or searching for dangerous through balls etc. He's obviously been here a couple more years since then though and as he gets older you'd hope he might now be more confident there than he was back in 14/15.
Either way though, very handy player to have around no matter what position he plays. I've never really been completely sold on him as a centre-back, particularly with the idea of him being one of our main centre-backs, but he's relatively reliable there in games where we're in control and not under too much pressure, and he's someone who's incredibly useful to have because he can cover three or four positions. I think you could argue he almost occupies a role similar to the one O'Shea had for us, only while O'Shea was more of a physical utility player, Blind's more of a technical one.
Yeah, I wouldn't be surprised if Pogba-Blind-Herrera was our best midfield. Fellaini has played well but he's better used for specific tactical jobs rather than week to week. Blind can pass and tackle, though he might not have great lateral mobility (which Herrera has done well).
Mourinho doesn't seem to think so, though, or he'd have used him this year there at some point.
Let's see if it can change for next season, perhaps we'll see this after some recruitments in other positions.
Blind is a pretty good example of the modern total footballer. Perhaps he would do a better job in Mourinho's midfield than LVG's. I base that on nothing really, but I just don't see the harm in deploying him in the midfield as a trial in pre-season. Mobility is always good, but not what a sitting midfielder should rely on. One could even argue that those attributes are more relevant for full-backs and centre-backs.
With injuries and suspensions (and other various reasons) pretty much inevitable in an entire campaign, it'd be a very wise choice to have Blind as a backup in midfield too, not just as full-back or centre-back.
Speaking of which, I yet again must say that I still can't grasp how few injuries (or suspensions) Chelsea have had this season, even if they haven't played so many matches. However, that's another subject.
My point is that squad depth is crucial, especially for the bigger clubs. No one plays with one starting eleven the whole season. Although that might be hard to believe after browsing through any given club's message boards. It's as if posters completely ignore about injuries and suspensions.
"We just need X for this position and Y in that, and Z in this and we're all set!" – that's the type of reasoning I'm referring to. Quite odd. Blind could probably fill out the role of X, Y and Z though.