Specifically the auctions. There are so many exploiters there. To the point that they bid and menu is just a waste of time and value. I want them to teach a lesson, where even if they menued, if they're the last ones who bid, it will still apply. Sounds childish, but worth's looking their faces.
Of all the sub-species, Jeff didn't disappoint me. Hear me out!
Before Jeff ever got the sub, all the species follows one route... SPIKES. With that being said, if they release another sub, we will now have this mind set where it has a lot of spikes, or spikier than the normal one. Jeff on the other hand didn't get a spear or spiky hair, but a gear to survive from different circumstances. Jeff became Semi-aquatic... imagine the power they have to turn something into different like actually different... Imagine a Qurogosk who can actually glide! Or a Konomushi that built for being land dweller instead of a flier! Or even Akanthos who can finally pupate and morph to it's fullest! These subs will be truly better than thos who only gets spikes.