ZOS, the solution to this debacle is pretty simple.
Reward V1-V14 players with TITLES or other COSMETIC GEARS (FOR EACH LEVEL) that will be truly unique and unavailable in the future patch/expension/promotions.
1) ZOS truly does not want to grant additional CPs.
2) No matter how much cap you place with CPs, there will always be dissatisfied old-hardcore-veteran players.
The Veteran-Ranked players are not just mere players. The Veteran-Ranked players are the “true lovers of ESO” who did not abandon ESO while plethora of the new games were released.
REWARD the VETERAN RANKED PLAYERS with truly unique cosmetic gears & mounts to compensate for their effort (and make sure not to reissue those cosmetic items & mounts in the future patches.)
Think of Grand Marshal ranks in WoW. They have stayed up all night long to achieve Grand Marshal rank. Their efforts are rewarded by them being able to use their Grand Marshal gears for cosmetic (transmogrification) and making them stand out even after the test of times.
Don’t do something stupid by rewarding same cosmetic gears for all V1-V14. Make V14 cosmetic gears truly unique so that the other future millions of players will look at these cosmetic gears and regret for not joining ESO in the beginning.
This will never solve “Veteran points =/= Champion points” conversion issue. But this would be the ultimate gesture of a true-hand-shaked-thank-you from ZOS to old “Veteran-Ranked” players for being with ESO during its infancy.