Crazy combos make everyone complain, just look on Reddit there are hundreds of users complaining about the state of the balancing.Then there is no idea in doing it, especially because many beta players left exactly for this reason during the launch-phase of Homecoming.
I would rather see some crazy combos for every faction, than Usurpers played by those who did not find their place in the meta and would like to spoil fun for everyone else, because they have a problem with any particular deck.
And if you have problem with RNG, then ask yourself, whether it isnt RNG when you encounter Usurper which beats your deck that fully relies on synergies with your leader.
The idea that only buffs can make the game attractive is a mistake, ask yourself why so many complain the game is unbalanced?
All leaders should be nerfed, their ability should not be able to create more than 6p difference then nobody will complain about Usurper and probably there only be a handful of people who will play him.