#45 Pubs are near impossible to balance for, in order to balance effectively you need to look at the best of the best. Sure, you keep the lesser skilled people in mind but there's little point in balancing around people who can't grasp the entirety of your game on any effective level and will eventually just become better players that will outgrow whatever you design based around them previously (and thus make it broken). Pubs are filled with people of a wide variety of skill levels and objectives (everything from try to win really hard to intentionally gimp myself to do silly stuff)
The amount of items that are actually 'worthless' in Highlander are very few. Many of them are extremely situational, sure, but that doesn't mean they need further balancing. This is already a game of Generalists & Specialists classes, weapons are much the same way.
If Valve wants things to be different they will make it different IMO. Unless I am completely mistaken, it was their idea to make a competitive player only beta and they worked with specific comp players to make that happen. Community feedback is great sure, but it is not actually useful if Valve doesn't care to do anything with it. Let's not ignore the fact that many people did come together and give Valve plenty of feedback united in the competitive beta forum on SPUF and they did practically zilch with it.
Stock TF2 community is already split well over 4+ ways - you have the pub community, the Highlander community, and then 2 different 6s communities who take completely different viewpoints on unlocks to begin with. You can't balance for all of these people very effectively. You can maybe improve it from where it is now, sure, but that isn't really worth the effort of a 3rd party mod that Valve is extremely unlikely to care about. If Valve on the other hand reached out to us, I am quite sure many of us would give them advice or ideas on whatever they want help with.
Trust me, you are preaching to the choir here on "people who wish TF2 was better". I am sure almost everyone on this site feels that way. It should say something that these people are telling you the idea is not worth investing in for them.