I want to talk about health potions here. Simple reason - just like many things in this game, potions are far from being properly updated for actual game we are playing here now. I did a little math. Now for a sake of discussion being constructive, I know my math is not 100% accurate, that there are many variables and other things to take into account here, but I can honestly say I did my best for this down there to be accurate enough to be relevant.
Okay so: there have been some major milestones in this game history and one of the most important ones we recently got was introducing 6* champs into the Contest, I guess we all can agree on that. 6 star champs are now 1 year old, they have become common part of all content and more and more players are starting to use them less or more regulary. It is also common that even average free-to-play players got their hands on Rank5 5 star champs now, at least one of them.
The game content is reflecting that fact - we got a lot of very difficult events lately (Variant, Maze, Uncollected ME...), in other words the content that REQUIRES champions on certain level.
If we go back like year and half, for the most major content that could give us an edge (mostly Story quest Act 5, ME etc.) we relied mostly on Rank 4 4star champions, that was the main force for most of the average player base I dare to say. R5 4 stars was still quite rare. But now - I know this can be a bit questionable, but anyway - for most of the major content, R4
5star champs took over. You can hardly do without solid pool of R4 5 star champs. With Act 5 done, there is really very little room for 4* champs anymore (some r5 4 stars are of course still useful). With greater level of all champs, there of course comes much greater health pool of each of them.
YET
Health potions haven't changed, not accordingly, not even close.
Let's see a little table I made below.
(I counted average health amounts from my own champs, I have 5 6* champs and I have only one R5 5* so far so I mentioned there specifically my r55starDomino to be accurate)

I based following claim on assumption that we moved from R4 4 star champs as main moving force of the game to R4 5 star champs in last 18 months (rounded).
With that said, we can see that cost of fully healed champion (using cheapest way possible and using only units) increased by 43% - meaning you will spend almost 40 units more for healing r4 5* champ than r4 4*champ once. With 6 star champs added to the game, its by 64% approximately. And I can give numbers only for one r5 5* (Domino), but for her its almost double(95%)!
I think my point is pretty obvious.
More advanced champions are added into game. It is of course Kabam's intention for people to desire those champs, to want to rank them up, put recources into them and use them for proportionally more advanced challenges they are currently adding to the Contest.
But Kabam, we need you to provide adequate resources for adequate price for us to do that. It is one thing to be forced some time to spend extra resources for this game (for some it may take money, for others grinding arenas), but it is entirely other thing to create content that continuously requires exponentially more resources to be even playable.
I also have to mention the fact that you, Kabam, created something called Uncollected free crystals-only source of health potions other than Store, for the purpose to adjust rewards accordingly for advanced players, yet you are offering level 2 HP in them which is painfully outdated offer to be honest. Uncollected players laught on L2 HP, what were you thinking really?
I think re-doing of HP policy is now one of TOP 3 priorities of this game to be playable in future. There is many solutions I can think of(adding new levels of potions and repricing the old ones / making potions healing % of health like Revive potions etc.), I'm sure you guys yourselves have many ideas too, but the goal here is clear - you need to adjust HP for new champions. Current state is untenable. You can't infinitely increase requirements and expect everyone to increase their expenses for this game (time/money) just as infinitely.
I'm very interested to see if there is some action on your side, Kabam, I will also gladly contribute to any discussion about this matter. Just reflect this issue, please.
Thank you