What will this do to the meta? I am quite sure the majority of builds will include 5-6 Dispels and 2-4 Seeking Dispels. In such a meta how many builds will include enchantments which cost more than two spellpoints? I might take some enchants for three spellpoints in my books (e.g. triple cost lvl one), but I would really hesitate to include level two out of school enchants into any book or level four enchants like Forcefield.
It'll definitely change the meta, but I'm not sure it'll be for the worse. I think one of two things is likely to happen.
1) People will begin saving their large enchantments for the endgame after they've already drawn dispels with lesser enchantments. If I'm playing a forcemaster and I want to use my forcefield(s) late game I might drop a magebane or two early game so my opponent has to choose between leaving the magebanes in place and saving his dispels for the big stuff or he can suffer the effects of the curse the entire game. And since I'm getting my own dispels and nullifies cheaper I'll have the extra book points to add the extra magebanes.
2) People will cluster their enchantments more (BB style). My forcemaster might not jump into the fray until she's got a facedown bear strength, mongoose agility, forcefield, nullify, decoy, regrowth on her. Then I reveal all at once and let my opponent either try to dispel them one at a time (very time and mana intensive) or go for the purge magic (and let him hope he guesses right on his seeking dispel lest he target the decoy).
A change? Sure. A change for the worse? I don't think so.