This is not ringing a bell. IIRC between generations there have been some decent GTI S deals (the 25k one) just like there were on base WRXs, but not 299 on a sign and drive that I remember. And definitely not a seasonal event or more people would lease one.
As someone who has leased a wrx and gti, the mf and residual here both suck, before you work on the discount (you’re roughly at A Plan, which is all I could get on my GTI).
If you want this car, and I could understand why, you can try and grind them on the payment. And obviously you can play other dealers against each other.
But. But. There are a lot of cars that can check nearly all the same boxes where you can get a bigger discount, pay less depreciation, and pay less than 4.58% to rent from VWFS (my current lease is 0.74% rent). I don’t want to jump in and start suggesting alternatives because the heart wants what it wants, but I’d look at buying a GTI or leasing something else. My 2 cents.