Remove the need for energy.
I think the one thing that's quite unfair and holding Raid back from even more popularity would be the fact that it costs a lot of a very finite resource, namely energy, in order to perform one of the biggest facets of your general game activity, i.e. for leveling and improving your champions through campaign (for chiefly experience for improving champion levels and money for upgrading gear) and dungeons (mainly for gear). The fact that, from starting at 0-130 energy like for a general player at reset, it runs out generally after around 4 hours of play when you factor in arena for maybe 1-2 hours. 4 hours isn't a lot at all for a gaming day. What are players to do when they want to play more than just that amount? Yeah, you have to buy energy for it. And it's not cheap either. 50 euros for 40 energy potions and 5400 energy. That's the cost of your average game for just two-three weeks or so of energy for normal play. Lots of people can't afford that. You also need to buy energy to get to the upper levels of rewards for tournaments and events. All of this seems quite unfair to me.
I think Raid Shadow Legends would become a lot more popular and possibly even generate more income if they allowed players to play as much as they want without having to pay extra. I'm sure lots of people hop off from Raid and move on to other games when they find out that you need to pay unreasonably much just to play the game to your desire. If I want to level my characters in the most fundamental way by improving their levels, getting the best source for money, and getting experience, all via campaign, I should always be able to do that like with all other normal games.
Let me know what you all think about this. Thanks for hearing me out.