Only problem i see for Red Bull is when the time comes to replace Adrian Newey that guy is a design genius.
People seem to think that Newey is the only reason for their success.
I disagree strongly with this.
RBR are successful not just because
1. they have one of the best lead-designers in F1
2. they have one of the best pit crews on the grid
3. they have one of the best drivers in F1
4. they have one of the best team principals in F1
5. they have one of the design departments in F1
6. they have one of the best engineering departments in F1.
etc.
If it was that simple, some team would hire Newey for US$50M/year and he would build them title winning cars every year.
Its a combined effect. This is the reason why rival F1 teams are finding it so damn difficult to beat RBR.
In any given year, some team matches them in 2-3 departments, but falls short in all the other departments.
McLaren had arguably the best car last year, but they didnt have the pit crew or strategy team which could allow their drivers to go toe-to-toe with Vettel.