The funny thing is that the main reason why WOTC has stopped worrying so much about complexity in new sets is because Commander and Arena are increasingly popular ways many people are introduced to Magic. If those two things weren't so popular, complexity would likely be a little lower.
To be fair though, I like that arena and Commander are as popular as they are, because it makes it easier to get a hold of Cube cards from the new Standard sets. It also means that random cards which would have been "junk" rares and mythics in the past are now worth actual money, despite the fact that they aren't usually that great. The only real downside is the added complexity and Legends being more prevalent but less powerful, both of which are reasonable sacrifices for cheaper staples in my opinon.
As someone who plays a lot of EDH, arguably my most played format over the years, while there are complex scenarios that can arise in a game I'd say that the majority of individual cards aren't particularly complex. Doesn't apply to weird niche cards, but "staples" that see a lot of play across various decks aren't inherently complex. Card interactions and multiple pieces working together can lead to some wild scenarios but unless you're dealing with funky layer stuff with older cards or various replacement effects, it's pretty easy to parse through via group input during a game.
I feel very differently about the insanely wordy cards we get nowadays or the continued use of named counters that don't really interact with things universally in main sets. I get what they're going for with added flavor or presumed depth, but I do think there are diminishing returns when it comes to newer players being comfortable. Strixhaven was the biggest offender, this set feels similarly clunky to me so far with mechanics. I think the biggest issue I see is how loose they've been with memory issues on cards in recent years. Like this abomination from a year back:
Thankfully this one was a commander card (and kind of shit) so you'll only ever run into it there, but effects like these that ask you to track something that they would have avoided in years past have started to leak over to main sets infrequently to the detriment of new players.
I just don't think complexity for the sake of complexity is particularly inspired design most of the time and unfortunately it seems to crop up more and more frequently. And I think if EDH is the main driver giving them a green light, then I think that's just yet another bad takeaway from Wizards based off of whatever data gathering methods they use (which I've always found to be dubious at best). They seem to make big changes to shake things up, not considering the long term ramifications, and then maybe roll them back. I imagine it's only a matter of time before they renege and bring back Core Sets for like 3-4 years before shelving them again. Like they did the last time.
