I'll try to answer as many as possible.
Sure United can repeat the title next year, as they are always contenders for the league.
Ronaldo
was a one trick pony: a selfish one with no vision more intersted in personal glory than the team, and who couldn't cross, wasted free kicks, rarely hit a barn door (with all shots taken) and was more interested in beating three men go for the fourth and lose the ball.
This season doesn't change the previous three. Let's be clear on that.
He always had potential though. I'll still won't call him WC; he is however in a world class form - that's undeniable. No-one knows if this season will the best or that he's overperforming (let's say he's a 13 goal player instead of 20). None of that matters though for this season because he's in a WC form for United. If he can repeat this season in the following he's proper WC.
When I say that he
foremost won you the league I stand by it. I have
acknowledged the other players in that post of mine, and I'm not disregarding them or their achievements.
Collectively at times, united has shown the best football in the prem (most attacking, arguably most entertaining etc); but when I mean that Ronaldo
foremost has won you the league is that at the times
when the team wasn't clicking or running right, it was 90% Ronaldo who bagged the goals or the assists (In the league). Scholes had a big role in those moments too but not nearly as much impact as Ronaldo when it was needed.
When I say that Ronaldo won you the league, those are the moments (and valuable points) I refer too, not implying that the amount of stepovers has an affect on the league position.
No-one can win the treble on the back of one person, and neither did I imply that (or want to). Ronaldo doesn't have the same influence in the FA cup and underwhelms in the CL.
However, in the league he's the one responsible for this seasons's title.