The purpose of this thread is to take an objective look at the second generation games to see why they are really underwelming games. This includes the new region, over 100 new Pokémon, new held items, and more. Of course including your own thoughts will make this an even better discussion. I'm sure most of us have played through these games many times and have a good look at what works and what didn't.
The Level Curve:
This was the biggest pet peeve for me. There was just no consistency in terms of levels throughout the region. Not to mention this also spreads to the wild Pokémon found making it pretty difficult to grind to be prepared for the Gym Leaders.
The lack of Dark-types during the game
Umbreon is the only Dark-type available during the game. Houndour, Murkrow, Sneasel, and Larvitar are only obtainable until post-game which at that point, you have to go through hell and back trying to train them up to match the rest of your team