scrap your current ideas. they obviously are not working.

im not trying to be the guy just ragging on your game.
the reality is im unfortunately still playing because i love skate. but i can see clearly why no one is coming back to play.
EA/Full Circle is pandering to an audience that doesnt skate and has never been interested in skating.
thats why instead of doing events based around being a skater or the community already built in skating your company has done the equivalent  of a mom seeing her kid skateboarding and saying "let me make you a little party for you and your skateboarding friends" 
the old series has fans  for life because they made skating look cool in every way from just skating to even falling.
this game just wants to sell you items by making the progress feel worthless and making most items that would be common rewards into paid for items. 

ive put 500 hours into the game. 

there is nothing boys. 

you wanna do the same missions over and over again just named different? thats skate. 
you wanna do a bunch of those same missions just to unlock a sticker and a tu-tu? thats skate. 
do you want skating physics somehow worse than the last three games? thats skate.  

somehow you guys have made 3-4 new ways of monetization in the shop but havent put anything into the physics to make the game fun since launch?

as soon as you put a paid for season pass people are treating the game as a launched game. 

your focuses are on howw much money you can make from skaters not "how do we make a fun  game for them to keep playing and maybe they will buy something" 

if no one is playing no one is buying.