As someone new to the Starwood system, I would have some definite suggestions for the system(which I already shot off in a polite email to them, hopefully they actually use the feedback).
I recently deposited my 2013 UY for SBP for External Deposit on mystarcentral (MSC).
Based on all the stuff I've learned on TUG, I knew I was gonna have to prepay my 2013 MF fees.
After I completed the process. I was never prompted to pay (nor given a message) on MSC that I needed to pay my 2013 MF for the External Deposit request. I even checked out my acct balances on MSC and it showed I owed $0.00. Not understanding fully how everything worked, I just figured I'd wait a couple days and see what happens. I could have called but it wasnt urgent and I figured it would work itself out.
Well it did, kind of.
2 days later (yesterday), I received a message on MSC from a rep @ SVO that said they were sorry they could not honor my external exchange request because my 2013 MF's had not been paid and told me how I could pay them online. I paid them immediately and then called SVO and made sure their system is up to date. They said that it was and that my External Deposit request was now good. II still shows pending on my reservation, so hopefully the weekend will have helped me not miss out and everything will be confirmed tomorrow when they talk to SVO.
Anyways, my point to this all is (yes, after all this rambling I have a point

)
Websites can be design so that they are smart enough to figure this stuff out to avoid 1) a lot of manual work and 2) confusion from happening 3) unhappy customers.
MSC can easily detect that you are depositing your 2013 UY (or whatever future year). It can also look at your account and know whether or not you have paid your MF fees. If you haven't, it simply makes you pay your MF fees as part of the External Deposit request, thus saving the SVO rep from sending me messages days later and me having to go back and do it later.
I pretty much worded the above statement a bit beter and passed it along as a suggestion to SVO.
-Nico