I, too, am worried about PA having a bad influence on the game by eventually implementing pay2win features (such as gold ammo, skins that give bonuses, premium ships, respawn/ship recovery for PLEX etc.).
Consequently, I quit my yearly subscriptions on all my accounts (I still have nearly a year on all accounts tho) and am unlikely to use any subscriptions lasting longer then a few months until I‘m reasonably sure that PA will indeed not interfere with EVE (as CCP assures us). I‘m not willing to pay hundreds of dollars at a time in advance in these rather uncertain times.
However, to get back to topic: I think the OP has it backwards. Most of your suggestions/worries are likely to actually have a negative impact on monetisation. What you seem to be forgetting is that CCP (and by extension PA) don‘t give a damn if you buy cash-shop items with real life money or if you buy it from a player who bought it with real life money. Either way, the item was paid for with real cash, so it makes no difference if you pay CCP $13,99 for a month of game time or you pay me ISK so I essentially pay the $13,99 to CCP for you (and obviously PLEXing an account actually costs more then a subscription so CCP earns even more that way). Thinking of PLEX/player-traded cash-shop items as “free“ (out of the perspective of CCP) is roughly the equivalent of thinking of self-mined ore as “free“ (out of the perspective of the player) - it‘s total nonsense.
The only possible reason CCP/PA could have to implement untradeable cash-shop items or untradeable PLEX from a profit standpoint would be if players had huge reserves of said items on their accounts already and CCP/PA were totally desperate and would be willing to screw these players (including the many whales) over. That doesn‘t sound like a particularly sound business model to me… I only see those kind of drastic things happening at the eleventh hour and don‘t think we‘re there yet.
I personally expect (and frankly, dread) many more gradual changes towards pay2convenience and perhaps later even open pay2win (we already have pay2save time in the form of SP-trading via cash-shop-only items so I don‘t think this is beyond the bounds of the possibilities, sadly).
I guess only time will tell… and in the meantime I, for one, will be observing the continued developments regarding monetisation with due vigilance.