I was trying to quote the guy who said that he would mention the nutritionist thing to the programmer to say thank you!
But the above suggestion sounds too ambitious so how about a minor suggestion instead: Can the developers nerf the Vatican Champion? My S+ gladiatrices are getting OHKOs. Is she supposed to get stronger over time? My earlier A+ gladiatrices beat her with little issue. Now she's overpowered against the S+ girls.
The reason for this is a really complicated one...
The game has an elemental damage system programmed into it, but the Vatican Champion is the ONLY thing in the GAME that uses the Elemental Damage system
Most Heavy Armors reduce your elemental resistance, meaning you will take more Elemental Damage.
Finally there is a glitch that causes Armors' Damage reduction to become permanent, then stack with itself... this can happen infinitely...
Which means that if you have been using Gothic Plate for a while... by the time you fight the Vatican Champion, your girl might be taking an additional +100 Elemental Damage... aka OHKO
How do you beat Vatican Champion? Train your girl with Leather Armor that reduces all damage (Physical and Elemental)... it's less Physical Reduction than the Gothic Plate tho, so you may want to take the first few stages a little slower so that they don't accidentally die too early.
Edit - Since we are making mentions of things that can be potentially improved in Jack...
Let me preface this by saying I've played this game plenty, I've made plenty of S chicks and such...
When you let a girl Express herself (Sing, Dance, etc) she gains Empathy and Temperament... but she gains literally 1 of each. Could we get this bumped up to 2 or maybe make it based on how skilled she was at expressing herself.
I understand that core stats are meant to go up extremely slowly but I also have things to do other than spending 40 days to get her core stat increased...
Same applies to Ambrosia, Walking outside, Gardens/Hot Springs
They all only increase it by 1... I just paid $25, which is a fair amount in game... I expect it to go up by more than 1...
Similar could be said about increasing her Pride. I know that if she wins the championship she gets a fair amount of Pride, but it doesn't seem like she gains any Pride for winning in Spars. Even if its just a practice match, I think even I get a little proud of myself for winning.