I googled this page from searching for fees in 2019. I don't see 2019 in the document, but it looks roughly accurate.
And this is the new announcement.
Old: Final value fee
New: Final value fee % + $0.30 per order
Old: The total amount of the sale includes the item price, and any shipping and handling charges. Sales tax isn't included in the calculation.
New: The total amount of the sale includes the item price, any handling charges, the shipping service the buyer selects, sales tax, and any other applicable fees.
Finally, the current Paypal charge is 2.9% on the total plus a 30 cent non-refundable fee.
So the fastest comparison is to say going from 10.2% to 12.55% is a rise of 2.35%, but the paypal fee was 2.9%, so you're saving a little money on each transaction.
But, if you live in a high tax state, and I do, that inclusion of sales tax in the price is significant. I will also point out it is fucking bullshit. As is the existing inclusion of shipping charges.
Current LA County sales tax is 10.25%. If we take 10% for simplicity, we can compare the fees on an item of, say, $100 (including shipping (which again somewhat rudely is subject to sales tax)).
FVF is 10.2% of $100 or $10.20.
Paypal fee is 2.9% of $100 + $0.30 or $3.20
Total = $13.40
FVF is 12.55% of $110 (with the tax) + $0.30 = $14.11
$0.71 cents more. If you live in some part of CA at the base sales tax of 7.25%, the increase is about $0.35.
I think if your local sales tax is 4.5%, then it comes out about even. If your local tax is higher than that, the new plan is worse, and vice versa.