This is entirely opinionated, I see where you're coming from but it takes a hell of lot longer to level a warrior than it would to level a mage, warlock or hunter. I just hit 60 on a druid on Nost and it took 12 days played. Obviously this will vary from person to person based on experience, character, will power and free time.
You're facing a slew of people pissed off at Nost for the terrible scripting, crashes and gameplay and the only real thing stopping a large influx of people is the time it takes to get from 1-60 again. You've seen evidence of people saying they wouldn't mind at all for a XP boost, blank 60, even that 0.85 multiplier sounds good.
In the nicest way possible, you'd think a server with such a great community and product would embrace this opportunity to grab some of the playerbase from Nost. I realise the yearn to not break the 'Blizzlike' feel but Kronos have already done that with the mounts and Nost have already done it with Kryll and will only implement more.
Don't look at the Nost population as the enemy that you're now feeling schadenfreude for, look at it as an opportunity to show the good in Kronos and really get the project rolling.