I think PVE has never been solvable as a perpetually active mode without treating it like true single player with no need for other players and a standard difficulty.
I recently did a very in-depth analysis about how Overwatch 2 is not at all different from OW1 in terms of experimentation and growth: create events, analyze what works well and try another path again. wrath of the bride, demon lord, starwatch, santuary trials… these are all modes that actually hide a strong PVE / narrative management on how to readjust Overwatch on a narrative or fight level. The fact that the current PVe is not very different from the experimentation experienced with archives only creates annoyance that they have literally blocked the entire game to develop that promise made at Blizzcon 2019. and ok, 5v5 has finally become the new reason… but essentially the failure of season 6’s PVE was the expected request.
The current PVE will NEVER be solvable with the bots and difficulties currently proposed. And I think I understand that in economic terms they can no longer afford to make the same investments and experiments as archives i ow1, since it involves proposing in-game cinematics, voicelines, music, narration, level design etc… as a free access event. And at the same time a story that is not always accessible to everyone when and how they want. And indeed, I say it clearly: sancuary trials confirmed part of my fears that a mode with even the smallest talent / upgrade tree only has slightly higher replayability… but not truly continuous. In fact, it even risks being visually worse.
For me the only remaining possibility is to convert the narrative PVE into a single player, with bots and difficulty managed according to the possibilities of the single player. The cooperative formula is renounced (or left occasional as underworld mode), but at least the marketing sells the various narrative chapters as Starcraft 2 style DLCs. In short, making this department of Overwatch a story campaign that too many people have been waiting for. The only difficult decision is whether they will also want to balance the customization of the bots participating in the single player mission or return to the old formula of standard characters like Gotheborg which only offers 4 heroes.