Edit: At this point I'd like to make it clear that I'm NOT saying that they SHOULD keep 21 skills. In fact I would like them to create a longer skill list. What I am saying is that they WILL keep 21 skills. There's a big difference.
End of edit.
And if we are getting 21 skills I'd very much appreciate it if they repalced the Heavy Armor skill with a Polearm skill and the Light Armor skill with a Dagger skill. Polearm would then be a combat skill governed by Endurance (same as Spears in Morrowind) and Dagger would be a stealth skill governed by Speed (same as Light Blades in Morrowind). I know the governign attributes are wonky, but a lot of skills have wonky governing attributes and we can easily mod them to something more sensible.
There are a few reasons why I'm proposing this change. One is that I am against having armor skills. I've already written about it in other threads so at this point I'll just say that they create an artificial limitation without providing an interesting strategic choice. You pick one of the armor skills at character creation and after that it's a no brainer to stick with that kind of armor. I'd much prefer it if armor simply gave static protection. This would actually make the game more complex because in Oblivion if you had 100 in Light and Heavy Armor you got the same protection from both Glass and Daedric armor and they were both weightless. Without armor skills there would actually be a permanent difference between the one and the other, with Daedric being much stronger and Glass being much lighter.
On the other hand I do want more weapon skills and I want the various weapons to behave differently. Ideally weapons would have an armor penetration stat in adition to their damage stat to help achieve that (which would be much higher for maces than it would be for swords), but even without it Daggers and Polearms would make distinct weapon skills notably different from Blade and Blunt (or Sword and Hafted as I'd prefer to call them).