For the long-term prospects Swedish politics, it's probably better to have a razor-thin right-wing coalition of chaos shambling around for a while, giving voter a chance to come back to their senses while minimizing the risk of far-right policies being enacted. Unfortunately, this isn't happening in a vacuum, and having a party that likely got funding and support to Putin (even if now they're posturing as pro-NATO) in government isn't exactly a great sign. Oof course there's a far bigger domino piece about to fall...
Isn't posturing as pro-NATO (and 'voting for admission' seems like much more than posturing) rather more than V is willing to do?
I think you're probably right regarding a narrow government of L and SD being more chaotic than a narrow government of C and V -- no party besides SD really has the same pattern of sloughing off a few independents every term. It's probably the case that the M government will in a few years end up relying on tactical support from C (or for that matter S) to stay in power.
(OTOH, I don't think there's a reason to think a 10-seat majority relying on L and SD would be more chaotic than a 1-seat majority relying on C and V, and -- while generational shifts can be tricky to rely on -- it seems like S is way, way weaker with the youth, while the stronger parties are
M most of all, SD, and V. Probably frictions within the right are declining and within the left are growing, even if the former are much higher at present.)