There is a couple things that I think would make gameplay a bit more interesting.
Hunting is one. I think it would be awesome if they could add simple flintlock firearms like muskets and flintlock pistols and blunderbusses, stuff like that. I mean, if you could make an ANVIL I think you could make a gun. Unlike the bow, you could shoot it right away, but after that you'll have to reload the gun, which could average out 5 seconds to reload. It's fast, but you're basically a superhuman. Ammo would be iron balls since lead isn't in Minecraft, and its kinda stupid to just add lead. Guns could make PvP very interesting as well.
With the hunting thing, they could add more passive mobs, such as deer, moose, squirrels, rabbits, you know, wild game. Birds could make it more interesting as well. Bears could be made into a neutral mob similar to how endermen and wolves act. If you get too close to bears or if you hurt them, they'll attack you. All the game mobs should drop a significant amount of food, maybe to last 3 or 4 days. This could help people in the first days of a new survival world. I'm actually really thankful for the new fishing thing. I just spawned a new survival world, and it was a series of small islands. There is literally one or two cows on my island, no chickens, and two pigs. There's a crud ton of sheep, but no mobs for food. But with the new fishing, I was able to survive (and I'm still surviving on) by fishing. In addition to that, I fished up a enchanted fishing rod with Unbreaking 3, Lure 2, and Luck of the Sea 3. If it wasn't for fishing, I'd probably die of hunger over and over. So more hunting would be great.
Another thing that'd be cool is more comprehensive villages. In the same survival world I just stated, I found a desert village on a REALLY big desert island. But it was a very small village, with a library, a smith, a church, and a hut. That's it. It would be really cool if villagers could actually fight for themselves instead of having a 15 per iron golem thing. Like, if a few "warrior" villagers could fight for themselves, I could stop saving them in the middle of the night. For my FULL idea of villages, check out my Village mod idea in my blog.
The last thing that I would like to see is better boats. The ones we have now are pretty glitchy as far as I know, and that's 1.7 pre-release. Similar to what they have in boat mods, I wish they could make something similar to that. Like, you craft the basis of a boat, like a canoe, or a sloop, or frigates, stuff like that. Anything bigger than a canoe or a raft you would need to build with multiple pieces, such as a you craft a hull, a deck, a bow, a stern, and a sail separately, then craft it together to make a sloop. Cannons would be a plus.
Wow.
I just wrote enough for a blog post. And that's exactly what 'm gonna do.
