I voted for both.
We've had a modified dark elf for 2 (or is it 3) seasons around here, so I've got some actual-playtest feedback.
Our initial change was this:
1. darkies lost their throwers (thereby access to PA category on 2 players).
2. darkies got ST-skills on blitzers (new vategory on 2 players).
3. throwers replaced by assassins (lineman with dagger).
It worked fine.
Changing access to 1 category for access to another category worked fine. It also made the whole "dark elfs prefer the running game" make a little more sense.
The dagger skill was probably a bit too good as a replacement for the pass skill.
Now, that GW has cranked the darkies up to 4 blitzers, our roster is a tad too good. So - we'll be removing the daggers.
Coincidentally, we'll be replacing them with "runners" - i.e. linemen with sure hands and no access to PA skills.
And that's what I'd vote for:
0-4 blitzers with G, AG and ST.
and - as "payment" for that
0-2 runners replace the throwers.
Martin
Even further 
