Long Version:
The inclusion of this category was simply because remodels will a signifigant part of the design landscape in the coming years, so it ought to be recognized with a new category. I understand that total "blow outs" will probably be put in the new categories.
I don't think this new category has a signifigant impact on the current situation facing clubs that remodel - it is up to the club (and its consulting gca) to do what THEY think is best for their course, which is exactly the same decision they face if rankings weren't a consideration.
The same design evaluation criteria for the new courses apply for the remodels. Whether a gca restores or replaces the original design ideas, panelists rate them as newly designed, according to the the criteria. If ta great original design idea was replaced with a stinker, it won't help ratings unless you presuppose that the GD panelists usually make gross evaluation mistakes in favor of new work.
And, can a gca worry about what a bunch of outsiders think when designing? As documented, there doesn't seem to be a ryhme or reason to how the 800 GC panelists vote, and there is certainly no guarantee that their course will place in the rankings, so it is hard to make decisions based on that.
Frankly, I believe a historical old club remodeling for rankings would probably be looking to get up into or back into the top 100, not get a one year prize, since there would be little marketing value in selling new memberships. Newer clubs or most public courses out would have some marketing value, but then no one is defacing a classic.
GD panelists or other raters never cross my mind while designing. However, I have often mused what the unoffical raters on this board might think of a certain design feature!
Then I remind myself that since I am not one of the favored few here, its certain they WONT like it, and I proceed about my business......
Short version: Not hard to imagine that there will be some unintended consequences, that Tom alludes to, but I don't think its as big a problem as our initial reaction might presume.