Keeping in mind one would have to play for over three years DAILY (4-5 years more realistically) to reach the "evergreen" rewards, I have some observations:
4x weapon slots - if you don't have all the weapon slots you'll ever need, or the platinum to buy them, after four years of playing, what are you even doing? This is completely useless.
3x exilus adapter - despite its high construction cost, 4-year players will have built whatever amount of exilus adapters they'd ever need. Useless.
3x forma is always good.
30k endo is nice, but chances are, a 4-year player will probably not need to max out any more 10-rank mods unless a new primed mod is released, in which case chances are, a 4-year player will have built up a significant stockpile.
50k kuva... basically you're fuelling in-game gambling to keep us logging in. Might have to look to the sters.
And finally, why no motherloving shotgun rivens?