The question revolves around reasonableness. You've designed a storage mechanism (inventory) so you have a mechanism in place to limit what players carry. Sure. You've created a stack mechanism to keep like items together in your storage mechanism because people will bitch about having 10 bobby pins taking up all your inventory space. Okay. Now you introduce weight as another limiting factor and slow them down when they already have to make multiple trips...unreasonable.
If you give me inventory space enough to carry 18 metric tons but then make it so I can't move, that's not reasonable. Reasonable would be to limit the number of items I can carry and/or limit inventory item stack sizes.
PC gamers have tools to mod games. Mostly. Console players do not have this option. Mostly. While this may not be an issue, for you, does not make this a non-issue.
The Werewolf: the Apocalypse kickstarter has officially started. This expands the Vampire: The Masquerade that already existed and merges the two under the World of Darkness umbrella that SmiteWorks is building for Fantasy Grounds Unity.
If you liked 5e but not a fan of what WotC is doing, I would suggest looking into Level Up: Advanced 5e. They've improved on a lot of things about 5e (e.g. monster stat blocks and challenge ratings) and you can still use your adventures and supplements (with maybe some tweaks).
In general, with as many different rulesets that exist, I would say that offering a bit more of what you want in a TTRPG experience would go a long way in helping people offer suggestions. Example keywords: sci-fi, fantasy, modern, cinematic, tactical, mystery, supernatural, etc.