I am a huge fan of your YouTube channel and always listen to your pvp advice at the gym so please don't take any of this the wrong way heh.
I personally like the new level 100 cap because it challenges players to make builds. You have to sacrifice something in order to make your build work and as a result, it makes builds in general a bit more balanced. Above that fighting players that are level 180, 200, ect, yea they get effected by diminishing returns but it takes the uniqueness out of the build because they are well rounded in everything with having no sacrifice in their character creation.
As for hacking offline to get through the game and getting the best materials quickly to make builds, ect is something I don't agree with. Like I am with you on this, I played this game since it came out and it is a pain in the butt making a character from scratch because of the farming required for the materials but at the same time hacking to get all of this stuff makes it unfair to other pvp players who have to farm. I personally don't know what this trainer can really do but from sound of it someone can quickly make a mage/faith build and push it to ng++++ for multiple copies of spells. Yes, your not really effecting anyone online because your in offline mode but is it fair for everyone else that works hard in making their characters legit? Also if people can use this trainer online it doesn't seem something I can trust people with lol. I know you don't use it online but I can't really depend on people not using it online in pvp either and that is the main reason I don't like the hack trainer.
All in all, these debatable topics could have been solved if there was some item transferring system in Dark Souls where you can transfer stuff to different characters to reward players that dumped countless hours into the game for getting materials, farming, ect. To this day I still cant believe they haven't implemented something like that and I think if they made the brackets 100-150, then 151+ it would solve the problems with the arena caps