Add diamond swords to tower defense. In my opinion it just makes no sense that it stops at iron sword like that. I think we should also add netherite swords as well because why not and of course if the user is below version 1.16 it would instead appear as a sharp diamond sword. This would add more upgrades into the game and many players prefer melee-ing the mobs over using towers. I also suggest making the bow go up to level 5 as well and make it fire explosive shots just like the level 4 archer tower does.
Happy Halloween y'all! 
