I found this hack a couple of days ago and i've been really tempted to fully play it but there is a slight problem.
I want to fully beat it: Pokédex, Contests and Battle Frontier. And both the 1% chances + the EXP grind are really an impediment more than a fun feature.
If you are open to requests, I would be really grateful to have a 5% chance instead of 1%. Would make such a huge difference when catching all those Pokémon. I get you have to be patient if you want to get your favorite starter, but I remember having to catch 2 Pokémon with a 1% chance in Drayano's romhacks (because the King's Rock was bugged) and it took me several HOURS. It's not a very entertaining task when you have to do it a dozen or even more times to get all those 1% Pokémon - even harder if you want to have a living Dex and need to catch 3 of them everytime.
For the EXP, i think it's a super grind having to battle the E4 over and over and over to get Pokémon like Dragonite/ Tyranitar/ Metagross/ Salamence and stuff to level 50, just so you can have it on your dex. Same happens with grinding for the Battle Frontier - reaching the level 50 is a boring grind, and the level 100 option is pretty much impossible.
Couldn't there be a sign in the EV cave where you can battle a team of non-attacking (only Struggle) Blisseys for easy XP?
Pokémon Insurgence had a cave with Trainers like this, 6 Blisseys with only Heal Pulse. You pay a little cash, choose the level (10-20-30 all the way to 100), and get your easy XP.
If you don't want to overcomplicate, you can just take a place like the Smeargle cave and make it so the only encounter are LV50 Blisseys or something like that. XP doesn't really matter after beating Steven anyways, but let's say I want to have a perfect Swampert for the Battle Frontier.
1)Passing Nature is super easy with a Ditto
2)IVs can be perfected with money
3)EVs can be perfected in the cave
4)But levelling all the way to 50 is a grind. Level 100 is impossible.
And I think that's it. Sorry for the wall text and let me say this is 100% the best QoL Emerald hack around here. It's so close to being absolutely perfect for everyone to play (casuals, completionists, old schools, new-gen players, everyone!) with the different options like being able to choose if you want PSS, updated moves or not, and things like that.
TL;DR: 1% encounters are evil, grinding is boring :(