Let's call it "PS Ultimate", a merge of PSPlus and PSNow.
1. The price does not change, same value as PS Plus.
At this point it would just be dropping PS+ and having PSNow the requirement for online.
The issue is that PSNow is not available in most of the regions Sony covers. That would be the first step.
But yeah, if this happened I would of course favour it. Though I don't see it happening anytime soon. While Sony is working at making PSNow better, it won't be what it can be until the market changes in favour of subscriptions over the more traditional method of sales that Sony (and Nintendo) favour.