This means you now have legacy items
Uniques in POE are supposed to be UNIQUE, not better, fluffed up and fancy rares. Some are just fluffed up rares, yes, and others are simply leveling items, but the majority have UNIQUE modifiers on them that cannot be gained anywhere else in the game, and as such can be build enabling. What you're thinking of is something along the lines of Legendaries from other games, which are the super GG items that have no better equivalent and are very rare.
For future reference, any characters in temporary leagues will be returned to their parent leagues, regardless of whether or not the game-play mechanics are being transferred to the core game. However, any League Specific items that you have in your stash/characters will also be transferred to standard, once again regardless of if the mechanics are going to the core game. This means you now have LEGACY items.
May
Path of Exile Skill Revamps - Part 6
It's only 3 days to the releasing of POE Incursion League, which is the core content of 3.3.0 updates. And GGG's Skill Revamps has proceeded to part 6, so I'd like to show you more details about Skill Revamps - Part 6
Dec
poe4orbs:[3.9]PoE Metamorph Templar Builds (PC,PS4,Xbox,Mobile)
Welcome to the best PoE 3.9 Templar Builds brought by R4PG. Choose your favorite ascendant from Guardian, Hierophant, Inquisitor and start your Metamorph journey
Jan
Best PoE 3.13 Ritual Mauarder Starter Builds
Many of the builds in this PoE 3.13 Ritual Mauarder Builds guide are good for starter that are popular with many players. For the three ascendancy classes of Berserker, Chieftain and Juggernaut, the focus of each build is also different. Hope it helps you.
Aug
poe4orbs:[Lake Of Kalandra] PoE 3.19 Ranger Starter Builds
Here is the latest PoE 3.19 Ranger League Starter | Fast | Endgame | Cheap Builds brought to you by PoECurrencyBuy.
Jun
Some Newbies Guide to Farm Currency in PoE
If you are getting to maps as a totally new player, it's hard for you to farm currency in Path of Exile, you will need to have a lot of tries to find the right way to farming money in this game, which will take so much time
Dec
PoE 3.12 Flashback Starter Builds | Fast, Cheap, Endgame
In the Flashbach event, the higher the level, the better the chance of getting official prizes. Poe4orbs recommends some popular starter builds to you, if you haven't joined flashback, you might as well take a look