It cannot be done, they can try, but unless they'll buff stamina specs about 100%, they'll never be even close to the effectiveness of spell AoE builds. Not until one of two changes happen, at least.

OPTION 1
- give each class a separate resource bar for Class abilities (aka reduce game to the WoW level and implement e.g. Rage for DKs, Energy for NBs, Holy Power for Templars and Arcane Power for Sorcerers). That way magicka/stamina would ONLY be used for weapon abilities.
- Stamina and Magicka bar would share one place, depending on which weapon are you using, and the third bar (resource) would ONLY be there for defensive actions (block, dodge, sprint, cc-break)
- guild abilities would use the class resource instead of magicka/stamina
- while this would make it really easy to balance class vs class, it would require DRASTIC changes to how all skills and items, and glyphs, and everything else in the game work, as to balance everything, each class would have to adjust majority of abilities and set costs for all guild abilities for each class.


OPTION 2
- this would be totally against what's left of realism though:
- change each class skill to ALWAYS TAKE THE HIGHER NUMBER OF THE PAIR: magicka/stamina, spell damage/weapon damage (after a modifier for it, else it would ALWAYS be weapon damage, as it's almost always about 80% bigger), spell crit/weapon crit.
- they MAY continue to all USE magicka as a resource (even though it doesn't make sense for some abilities, mainly about 2/3 NB's and 1/3 Templar's), but they would finally SCALE properly. Even that would be a big plus.