Thanks for playing my game!
1.) Agree. There are currently 70 different items in the game, but I only recently started adding gear that will drop after a certain amount of battles (e.g. Worldbreaker/Titan and White Reaver gear). There is more to come.
2.) The archer shines when there are more enemies (especially with the Piercing Shot). Also it has to be balanced as he usually does not receive any retaliation damage like the melee fighters. There are plans to improve your archer via the skill tree later though (e.g. by shooting 2 arrows instead of 1, improving his accuracy).
3.) Yup.
4.) You don't like watching your dwarves do a little cardio? I do get your point though, but I can't really think of a solution right now.
5.) I'll look into it.