An Advanced Way To Improve RPGs

I was thinking of ways to improve RPGs of today in a more advanced view.

1. Item Trade Boost- when the player trades in 3 of the same low-level potions or ethers. The player receive 1 potion or ether that slightly restores HP or MP. This is an option to allow the player to get better potions and ethers that he or she has saved up depending on their level range.
2. More Experience- I believe that players deserve to gain more experience. So, the RPG should include strong or strongest enemies that give more exp points the player desires. This is to influence players' goals to level up their characters at max.
3. Item Buffs- the player can create items to use on it's party of monsters to temporarily give them buffs for one battle.
4. Battle Phases- As the player wins a battle, the battle phase go up by 1. When the player has reached battle phase 10. The player receive bonus items that's useful.
5. Status Problem Increased Chance- if a monster have a certain weakness of a specific status problem it'll have an increased chance of getting in a status problem. For example, grass type monsters are more likely to get burned if hit by a fire type move. Water type monsters are more likely to freeze if hit by an ice type move.