There are only 3 ways modern can ever evolve: New prints, bans and innovation.
a) Right now, Gruul Ramp seems to be that "innovation", although to be fair that deck has been a thing for ages in some form, it just got several good cards recently and is well positioned. I fully expect GR Ramp to disappear as fast as it showed up the past weeks if the meta shifts. And outside of some splash-in-the-pan decks, I think modern is solved enough that it's fair to say there is pracitally no capacity to upset the top decks or effectively metagame against them (Gruul Ramp being the exception for now).
b) New prints: if we accept that the top tier is too far removed from the rest of the pack power-wise, new prints would need to buff tier-2-and-below strategies WITHOUT easily slotting well into any established top deck. And there is a huge problem there: you can't go "off-color" with good new cards, because if its good enough, the Simic Uro Snow core will just splash a 4th color or go into another shard to play that new card. Basically, any new, powerful card can easily be adopted by this core. A solution would be to print either Snow-hate or something like "you can't cast this if you control a snow permanent" but at that point, Snow strategies would be strongly warping card design, to me that sounds way worse than any ban.
c) bans: I still firmly believe that it's just 2 cards that play the biggest roles by far in screwing up modern, Veil of Summer and Arcum's Astrolabe. I'm too drained at this point and it would be too redundant to reenter the discussion why, but there it is.
While there is some diversity at the top of competitive play, it is an extremely exlusive club. it has become pretty much impossible for new strategies to do anything other than die horribly to the top decks. One or more of these 3 tools to advance Modern will have to be used in the near future. The new set seems to be doing diddly-squat by way of new prints (and those come with a lot of problems as mentioned), innovation seems to be exhausted by Gruul Ramp, so to me, a ban is what Modern really needs, and what it will most probably also get.
If it's just one card, ban Veil of Summer, leave Astrolabe.
Btw I think at this point it is obvious that WotC's approach to try and nerf top decks is pretty worthless. I don't know what the alternative should be, but here are the facts: They tried to hit ETron, its one of the unreachably powerful decks. They banned TWO core pieces of UGx Urza (Oko and Opal) only to print 1 new one (Uro). Its still one of the unreachably powerful decks. They banned OuaT, and Titan decks are still part of this tier 0,5. Other, lower-tier OuaT, in turn, have disappeared.
It absolutely cannot be stressed enough how humongously the design team screwed up in 2019. It's quite baffling. To be frank, it really boils down to a bunch of completely insane 2019 cards:
Urza (ultimately got Opal banned), Uro (replacement for Oko), Oko (banned), Hogaak (banned, got Bridge banned), OuaT (banned), Veil (almost everybody hates it and wants it banned), Astrolabe (is fast approaching OuaT numbers of play), Wrenn, T3feri, Dryad of the Illysian Grove.
Obviously they shouldn't all be banned, but these 10 cards weren't power creep, they are huge power LEAPS.
While I'm at it: I also don't understand why burn, a Tier 1-2 deck for YEARS, needed several additions (Skewer, Canyon, Islet), so 10 new maindeck slots for Boros Burn, and an entire side-kick archetype in Prowess Deck Wins (Lava Dart, Light up the Stage, Canyon, Islet). Boros burn also reached a whole new power level, it's just not as flashy because it's always been there as an archetype. But boy, did it get better. By a TON. Another gift of 2019.
PS: And no, I don't believe in a "golden age", whenever that was. Modern will and should slowly evolve with the printing of new sets. But not by virtue of a plethora of pushed cards.
I mean, I remember when they printed
Dovin's Veto and I thought "damn this might be a pain to face". Little did I know then what modern would become^^.
PPS: also Astrolabe decks have completely homogenized, the "diversity" people saw when everybody was brewing crazy piles of greedy mana requirements is now: Bant Control / Bant Snowblade (50+ cards overlap, its basically the same deck with or without the Mystic-package) and Temur Uroza. Every other cute, "diverse" little brew with Astrolabe is all but gone, which, to be honest, was very predictable.