Hello, friendly Random Battle player here.
First, a few notes.
"Dynamax is the gimmick of this generation, we didn't ban Megas or Z-moves, banning dynamax results in a watered-down version of gen 7 randbats"
None of these arguments have inherent value. So why waste your fingers?
"Random battle is the fun meta anyway, and Dynamax is fun"
Too subjective. Still no inherent value.
Random Battle, in recent generations, was not a luck-based game. Sure, any one game always could go south (and you know they did.)
But you know what says a lot more than one game? Hundreds of games. Thousands of games. You can't write off a high GXE as 'just luck'. It's an aggregate.
The fact that some players rose to 80%, even 90% GXE (never got to 90% myself) indicates that there was something they did differently than the riffraff. Something that took practice.
See, even if you think one match is about luck, the aggregate of hundreds or thousands of games is about skill.
What is skill?
In Random Battle, up until recently, skill was determined by different factors than you would find in tiered metagames like OU, and UU, etc.
In a tiered meta, part of skill is teambuilding skill- having a game plan that reflects an understanding of current metagame trends, i.e. understand what threats are common now and am I prepared for them.
On the other hand, one aspect of skill in Random Battle is putting together a plan on the spot. Right now. How many contingency plans do you have? Can you recognize your win condition? "I don't know their entire team, so what are the risks vs benefits of saccing the creature in front of me?"
You have to gather information as fast as possible, evaluate the risks, and sometimes, make a read based on limited information.
These are all elements that take practice.
And yes, sometimes you're forced into a 50-50 scenario because of a speed tie, or you aren't sure if they have a scarf or not, etc.
But again, in the aggregate, your analysis skill is really being tested.
Sometimes you lose because of Geomancy Xerneas having very few counters, but that's the way the cookie crumbles. Move onto the next battle.
---------
Now? With Dynamax?
There's a lot more Geomancy Xerneas. Sure, they aren't called Geomancy Xerneas, but you know the names. You know the faces. Shell Smashers, Max- Airstreamers, etc. They're everywhere.
Slow down. I get it. I recognize that there's some degree of skill to be had here. It's a different kind of skill, I suppose. The skill of recognizing when you're about to get absolutely destroyed if they happen to dynamax right now, and the skill of flipping a coin on whether they're gonna do it or not. (That's sarcasm, in case you couldn't tell.)
When compared to previous iterations of Random Battle, the number of situations where you quite literally, automatically lose has shot up. It's gone up.
Don't say that it hasn't, because it has.
And that represents a diminishment of skill.
A game full of good moves can be overturned by factors outside your control.
"But we've always dealt with that reality!"
Yes, we have, but it was a result of RNG. Nothing we can do about that.
Now, kicking over the table when you're losing, or securing an insurmountable lead with no preparation or thought?
It's been turned into a gameplay mechanic.
And we sure as hell can do something about that. It's called a ban.
Sure, it's my opinion, but at least it's got a principle behind it. The principle is that [The higher skilled player should be more likely to win a game.]
And, right now? Admittedly, the higher-skilled player IS still more likely to win a game.
That statement becomes MORE true, however, in a game without Dynamax.