I put together a little spreadsheet to analyze what current UCT ticket (the Mousesavers discount price) would maximize the bridge to the new gate prices. My assumption from what I read from Cheshire is that after I use the ticket (no matter when it was purchased and for how much) it will be bridged to the current gate price before determining the AP upgrade price, and that I wouldn't get a refund if the current gate price is more than the AP price.
So, a new DVC AP will be $419, $446.24 with 6.5% tax.
A 6 day MYW with no expiration (no hopping or water parks) from UCT is $332.35, $353.95 with tax. After one swipe through the gate, this ticket can be bridged to a current gate price of $389 (excluding tax) and I can have my DVC AP upgraded for $30 (plus tax). Total savings = $56.65 (excluding tax).
The 5 day Hopper with no expiration (no water) and the 5 day with water no expiration (no hopping) are close - a couple dollars less savings because you lose $2 on the current gate price of $421 vs. the DVC AP price of $419.
To other analyticals - what am I missing?
So, a new DVC AP will be $419, $446.24 with 6.5% tax.
A 6 day MYW with no expiration (no hopping or water parks) from UCT is $332.35, $353.95 with tax. After one swipe through the gate, this ticket can be bridged to a current gate price of $389 (excluding tax) and I can have my DVC AP upgraded for $30 (plus tax). Total savings = $56.65 (excluding tax).
The 5 day Hopper with no expiration (no water) and the 5 day with water no expiration (no hopping) are close - a couple dollars less savings because you lose $2 on the current gate price of $421 vs. the DVC AP price of $419.
To other analyticals - what am I missing?

.. I know many people have done this without any issues, but this is what happened to us. 