Yes you say look at the bigger picture & usually I'm the same but imagine this scenario if you will.
Saints get a new owner in the summer who then gives RH a huge transfer kitty & he buys the players he thinks will suit his system. Saints then get off to a good start for the first few games before being dragged in to the relegation places at Christmas, the board finally have enough of RH & bring in a new manager who then has to deal with the players Ralph bought & who don't fit his/her way of playing. We are then in the same cycle of wrong players for wrong system roundabout.
Instead why not thank RH for his service & move him on so as to get a new man in who can then build their own team using said new investment etc during the summer?
You say why should we stick with Ralph when he may go and buy players to suit his style, then get sacked, then have a new manager who's stuck with players he doesn't want....
Well Ralph is still stuck with a lot of players he doesn't want himself. Players who were bought under different managers, who haven't been much good at all since we signed them. Sack Ralph and you then have a fourth manager who comes in to deal with a squad made of signings from a variety of different managers and styles. Arguably we'd be even more disjointed.
Since Ralph came, his permanent transfers are Adams, Djenepo, KWP, Diallo and Salisu (hopefully I've not missed any). Some were signed due to their potential, which doesn't exactly help for the here and now, and some have gone straight into the starting line-up. Up to now, he's been hamstrung by a very small budget, hindered even further because the failed signings of previous managers/chairmen have taken up a lot of our budget and wages - and although some have moved on finally, there are a few STILL to be shifted like Hoedt and Lemina.
Five permanent signings or so in five transfer windows is hardly much to work with. He needs this summer window before we can truly judge him in my opinion.