An NG+ category

Complete all the worlds (separately or a all worlds run) but in an already started account, so you can complete the worlds with plants from other worlds already unlocked.

this would also make it easier for all players who can't emulate the game to a previous version and it would still be an interesting category for the game

We used to have that but removed it back when playing from a new profile still gave you world keys. Maybe we should add it back.

One essential rule that we wouldn't be able to go without would be to require all plants to be Lv.1, except for the Peashooter which would be allowed to be Lv.2.

This category is good for the people who want to speedrun it with newest version i see this category should be added

I agree, I think ng+ for any% and 100% would probably be good for newer runners.