It's an equipment freeze, not a base freeze.... new hires assigned NYC 88 would be free to bid any other 88 base on ensuing bids the first 12 months.
Like a previous poster said, 1st year pay is the same regardless of equipment.
I'm also going out on a limb here, but I don't think you'll see any new hire ER pilots again for awhile. With a few dozen MD90's on the way and 100 737-900's between 2013 and 2018 I'd say the junior equipment is fairly obvious (and both types of equipment where a new hire could probably get to most bases within a year)