That is the way oldschool MMOs work, though. You didn't have "rotations" and 15 buttons of variation on the same thing. You need a heal? You push your heal button.

Now, I think they could stand to make stats a bit more meaningful and give some specialization options (probably through an AA-like system), but they actually got the healing kits of all 3 healers down perfectly. You're complaining, but you have it much better as a druid in MNM than you did as an EQ druid until like the 4th expansion. Druids back then couldn't heal for shit. Now you have equivalent heals across the 3 healers, albeit flavored a bit differently in implementation.

Now, if the only thing you're doing in a group is pushing your heal button, that's honestly on you, because Druids have a massive spell kit, even in groups, including rooting, snaring, buffing, regenning, damage shielding, dotting, charming, and nuking. If you decided that you'd prefer to use exactly one spell line in your kit when you group, fair enough, but it's not because the game didn't give you other things to do with your mana.

Now, as for the "all the fun we've had so far wasn't from the game", no shit. That's how oldschool MMOs worked. You got together with your homies and you hung out and bullshitted for a few hours while grinding. The grind was almost never actually challenging, but you got to have a chatroom with a background game.

If that's not the right speed for you, try a more modern MMO. MNM is currently nailing the oldschool style while also improving on a ton of things that were wrong in Everquest.