I'm not against having Coats and Twines drop from the new 24 man, but I think it should be 2-3 weeks of tokens per Coat and 4-6 weeks per Twine.
It's 10 ilvs, not 50. It'll already be 12 weeks to gear a single class in i200 -> 210 if they already have the eso, if its 1 upgrade per week. Don't make it last 6 months.