"Basically, the dev should take everything he can from Powder and put it into Delver. Then it's the perfect roguelike."
Hi, I was the guy who posted that in the chan thread. I feel like I should expand on that a bit more with some things I've seen in Powder that would very much help this game. To be concise I will use bullet points.
-Books and tomes containing instructions to learn specific skills and spells, things like Medium weapon proficiency, a tome of fire magic, etc. These books have a limited use and will dissipate once the limit is reached.
-You can use these books by earning skill points while leveling up, the player can follow certain deities based on their preferred playing style and be granted boons for their devotion to the diety.
-Deeper combat mechanics aside from spamming Right-click, adding shields would help. A specidic example would be a mirror shield to reflect magic bolts. As well as silver swords to do increased damaged against undead. That couple with skills you learned from books would do nicely.
-Randomized starting loot and item qualities. As in that red potion may not always be a healing potion, in your next playthrough it can end up being poison. Keeps the players guessing. Adding means of identifying items aside from direct use would help with that. Adding cursed items would add extra tension to the game as well.
-Difficulty. I'm sure the dev is working on this. But I do think it would be fun to see those type of enemies you just want to avoid entirely, like a cockatrice which will turn you into stone, powerful necromancers with undead goons, minotaurs, golems, etc. Each enemies should have some unique quality to them, makes the player want to take stock of his assets and use whats best for the situation. Perhaps an active pause mechanic will help in this. Adding unique monsters with names would be nice too.
-Enchantments and special items. It seems the dev has already incorporated this at some level. Would be interesting to see some named items that carry extra special properties.
Those are just some things I'd like to see in Delver, I'm sure the dev has already thought of some of them. Also (to the dev specifically) if you haven't played Powder yet I highly recommend it, give it a full playthrough or two. Powder's mechanics are almost perfect for a game like Delver. Good luck and have fun