I think this makes a lot of sense. I know that there are other, bigger name managers who are out of work right now, but realistically it was always going to be hard to bring someone big in on what's basically guaranteed to be a short-term contract. Barring some sort of miracle where we win the CL, FA Cup and make top 4, we'll have a different and permanent manager in the summer.
In most cases when a manager is sacked, a club will either bring in a new permanent manager straight away - and this will all be coordinated appropriately - or the club will appoint either the assistant or one of the coaches. In this latter scenario we'd be left with staff who have very little significant managerial experience. Ole theoretically should be a step up from anyone we have available internally in that regard. We're clearly not ready for the former scenario and won't be until we have the DoF in place, and it makes sense to wait until the summer if we're going to poach an already employed coach. For instance, if we really want to go all out for Poch, stealing him from Spurs in the middle of the season is likely to put the kibosh on any hopes we'd have of signing players from them later on.
The other consideration is that we're in a position where morale is incredibly low. The players are frustrated and not working as a unit. The matchgoing fans are unenthusiastic. Social media is turning against the club. While we could have brought in another legend like Hughes, Bruce, Keane, etc. who have managerial experience, I don't think they'd be able to galvanise the club in the way that we need. They were all brilliant in their time and in their way, but I don't look at any of them as options that make me excited in the way that Ole does. I guess it's because I have these memories of him coming on late in the game and making an impact, and it feels like that's what he's here to do again. Only time will tell if he has the ability to manage the egos in our dressing room, and only time will tell if this is a genius move or a disaster. But, to be frank, right now it feels good and that's something that has been missing around the club for a long time.