I mean, I get what you say, and it really, really be helpful for players like me, who recently began to play, and don't have anything really, but I would argue with your first point. 

So I agree that not much of the players buys silver for money, that's true, but let's see how can we earn that silver in-game: farming either dungeons or campaign, meaning we have to spend energy for it. If we could mess around with the gear we have, and let's say we have insane luck, and pull some great gear, wouldn't we just put it on every single team we have? We could use it for all the content, for all the champions "at the same time" (obviously not in the same team). That would mean that we don't have to push that hard to have multiple high-level gear to gear up e.g. all our nukers or speed boosters, we could just spend our free energy, that we can get from quests, and if we don't get anything good, we try again next day, not holding us back, because we can put up an already great gear for free, if needed. So, we wouldn't spend money on getting energy, getting the gear packs, which are quite expensive imo

I'm not saying, that it's good, I'm saying that your point of view may not be relevant for the company, because of theirs, and even if you're right, they won't change it up, because they need/want their money

Silver costs gems, gems can be purchased for real money.

no cost gear switching would be nice.  Burt it would let players with godgear to freely switch it around to suit any team they needed for a certain defence, making them invincible.  Yes they can still do that, but at a cost.  Also note, that's not experimenting at that stage, it's just putting on godgear for free.

I don't know your level, but there is a steep learning curve in rsl, resource availability slowly snowballs, and eventually silver will not typically be an issue if you spend it wisely and know where to get it.