Long time PTE sounds great! and it's nice to see you are taking sugestions from player let us see...
-For awesome rewards
*+9 Vigilar/Abyss really?? this! NO, no way LOL.... but +7 evil weapons idea is good!! for armors, not really sure of that, i think weapons will be better choice.
*Pets.... i don't think is a good idea, unless you put a pet that is still not available in the game... 'cuz what happen with that people that already have the pet? i don't need another of the same pet... so it will be a waste for some of us D:
*Character Costumes.... as far as they are not those that we can already buy with feso then it will be ok too! school uniforms,summer costumes,rockstar costumes, polar bear, and others that are not available from feso shop!!.
*Weapon Costumes this >YESSS!! there are never enough :X really need bracelets, ice,lightning,fire ones Scroll costume too! (make it happen!! =D) also great sword,sword, pistol/rifle, polearm, crossbow, cannon (even thought we got cannon in last PTE) and such, are some of most wanted too and it won't make market crash or anything like that since basically you will never find them on sale...
*Characters cards.... this NO pls DON'T! D:< seriously... this is similar to pets thing, don't need another card of the same character! (since it will be "event" can't even trade...) this will also add some more points to> market crash, (which is already broken in this section) we will never be able to sell the chars we get from LS if they will be simply free... personally, had this problem since "Joker Event" and i basically gifted the characters i bought, sold in super low price, and still having some stuck in my vault...waste of money e.e (not good for people who get their vis by selling this stuff) i'm not against this kind of events, since it's nice for lot of people, and newbies, now they can afford chars, people can't complain, there are already lot of premium characters super cheap, and even totally FREE 'cuz of "Gabriela's Retaliation" event, so please..we don't need more of this, let the rest of chars remain "rare" as they are supposed to be u.u
-Random Rewards - i agree with some people about exp cards... last time i got several of them... there is no need, since there are lot of daily quests that gives exp cards already, if you can simply remove them from the list that will not hurt.. in any case >1d pass for Sacred Chaos dungeon or Ancient en Celar are better options, training cards still ok!.
*Soul crystals, EETs, chips, principal potions, socket tranq. etc, as usual, are fine for common random.
*If u doing giving the +7 weapons, then what about time ores in random rewards too? also what about 34 ar blessings?, or great obsidian/spodumene (those are most wanted) ?
*If weapon costumes, then weapon rumin boxes as last time and angel costume box (or any other) for most rare random.
*Artifacts materials sound good option too for random (not so common not so rare)<