Can you still swap your equipped items freely while in combat? If so, having a plethora of equipment pieces with situation-dependent effects is yet another reason why it should cost some type of resources to swap equipment in combat (preferably 1 weapon swap per turn and you can't change your armor/accessories).
Else the issue shown with shields - where ranged characters can freely swap weaponsets to get the benefit of both their bow and shield every turn for free - is vastly expanded via all the possible weapon+armor+accessory effects. This encourages tedious gameplay where you constantly change your equipped inventory possibly multiple times per turn.
Yes, you can still do it for free.
No currently swapping your gear out in battle costs either an action or a bonus action I don't recall which
Equipping item costs Action ...
Switching between meele and Ranged weapon costs nothing ...
If you have Shield equipped you have AC bonus no matter what (m/r) weapon you are curently holding.
If you are not proficient with shield tho you get disadvantage to every roll you make.
There still is a reason for ranged weapon using characzers to swap back to meele and that is Attack of Opourtunity ... wich works for meele only.
a deeper analysis and comparison
Problem i have with your analysis is that it isnt objective ...
For example:
You claim that Everburning Blade gives you "constant bonus" ...
But that bonus only saves you single Bonus Action ... wich is mostly wasted anyway ... also that sword lack versatility of others since no matter what you only have Fire bonus damage, every single regular Greatsword is potentialy better against Fire resistant enemies since it can be poisoned and reach better results then.
For some rwason you never admit Sussur weapons have silence effects ...
And that statement about Axes is also wrong sinve Half Ocs are effectively tripling their damage when crit with Greataxe while they only get +1,5x bonus with Greatswords.
Thats why i say you are only telling us your opinion ... it doesnt really matter how did you get it.
//Edit:
Also you cant really measure silence or AC bonus since their value depends on who are you fighting ... that is why i said there is no clear way to tell wich item is "better"
