Getting help for these quests has become nearly impossible, as people look for 'profit' over 'fun' in this videogame nowadays and won't 'waste time' on activity that involves no great rewards. I know there's people out there like me who still like to at least do this content once, just to see it in the Complete Quests log, and so I'd appreciate if dev team could do anything to help us. Here's a suggestion for each.

Make The Gustaberg Tour no longer require a party of six. Two, at most three people requirement would be fine.

Raise level cap of Eco-Warrior to give the player a chance of solo/duo/trio it with some challenge. I think lv30 would suffice.

More suggestions are welcome. Please dev give me some hope!! I hate to see some of the game's fun cut out from me because of population decrease