The numbers prove that solo players are being offered progression options with lower and lower iLvls each patch (in comparison to the max iLvl of the current patch), if you would actually look at the numbers objectively instead of clutching your elitist pearls in disdain at solo or casual players being awarded gear with a purple-trimmed icon.
No, solo gear has always been hard-capped slightly below Normal iLvl raid gear.
For example, raid gear in 9.0 was 200/207, but gear obtainable by solo players was hard-capped at 197 (covenant sets and unrated PvP) and 194 (LFR and world quests).
Raid gear in 9.2 was 252/259 with tier set bonuses, but Zereth Mortis gear was a mix of 246 (tier set pieces and trinkets) and 252 gear (Cypher gear).
The numbers really don’t lie.
Open world gear is not “catch-up gear” if that’s the end of a player’s progression for any given patch.
If soloers are playing the game incorrectly by gearing up through the open world, then devs need to put gearing progression in Torghast or some other gameplay-dependent feature that scales to solo players.
But why did devs not scale up any parts of the open world?
The Fated raids and new M+ dungeons were not new assets, either, they were just old assets scaled up with affixes. They could have done the same thing to any zone in the open world.
There was no need to increase the iLvl for dungeons, raids, and PvP either. Any Fated raids or M+ dungeons could have been tuned numerically for Season 3 gear, with just special affixes to make them more interesting.
You can’t beat everything at your disposal if you don’t get gear upgrades. Many players want to solo rares and old raids, and could have used a 26 iLvl boost.
Vanilla WoW was designed so that you could reach max level by questing or killing mobs as a solo player. If you had played other MMORPGs at the time, you would see that WoW was specifically designed to be more solo friendly, and it provided hundreds of hours of solo progression and exploration.
Season 4 bumped up iLvls for raids, dungeons, and PvP by a full 26 item levels. The devs didn’t design it as a half season at all, just as a season that intentionally excluded solo players.