Westgate raised those fees several years ago for resale owners. The simple solution going forward is don't bank internally. The bigger issue isn't that they raised those fees to the point where the internal exchange program is worthless to resale buyers, it is that they didn't publicize the change so you would have known not to bank internally. Westgate allowed resale owners to participate in their internal exchange program at the same cost (lower than II) for many years. Then in about 2013 instead of grandfathering current participating resale owners they tripled the exchange fee and added additional fees if you were uptrading in season or size but still allowed participation. For the benefit of those who own other system, it would be like allowing voluntary resale Vistana owners to participate in SVN or post 2010 Marriott resale owners to participate in the DC but only with an additional $400-$600 per usage charge. Most just wouldn't do it. There are other less costly ways to exchange. Problem only comes when you have already banked several weeks because you didn't know about the fee and didn't know about other exchange methods and companies.
To the OP if you have used your last 3 years, just let them go and moving forward, either use your week or get an Interval International Account ($89 annual membership fee) or use one of the independents like DAE or Trading Places, or others.