So we played another game this weekend, this time with no rules tweaking or changes. Things started out pretty good and even, but by the end of area 2 of the first base level the heroes had enough treasure, cash, and tokens to exhaust the silver treasure deck and be fully equiped with multiple potions.
While I cant remember exactly how each character was equiped entering area 3, most of them had amour 4 with an item that would negate at least one wound, as well as their potions and magic items that had healing effects. They also were equiped with weapons that were rolling at leat 6 to 8 attack dice ( including power dice , eg red/green/green/ylw+ 3 to 5 blacks ) and melee characters were capable of multiple attacks.
I dont need to tell you that this was completely overpowering. Monsters were basically unable to cause any dmg, and if they did it was immediately healed, and anything I spawned was dead the next turn. Even the boss mob and buddies at the end were not much of a fight and the experience was anti climatic. The heroes killed both red manticores before they had a chance to attack as well as dmg the named mob for 4 hits. The named mob got in one attack before he was dead the next turn. They didnt even both opening the gold chest as it was un-necessary to complete the level.
This left the players feeling like the game was too easy and not challenging, and we were glad to have the game end as it was clear after they re-equiped in town that they could rampage around unimpeded. So now we have had one game where it was too difficult, and one where it was too easy. I have read your suggestions and with this new experience my new thought is now not to change the rules, or game mechanics. I can see how not allowing characters to move diagnonally passed walls etc really hemmed the players in and made manuevering too difficult. However, the game diconnects players concern to keep their heroes safe when nothing can hurt them as they become over equiped. I think we will play one more game of the first level limiting treasure chests to one card per player per chest and take out all cache horde cards. Hopefully this will strike the balance I am looking for.
Thank you for all your advice.