Looks like they have two: “Awake” and “Watchtower”: https://www.jw.org/en/library/magazines/
In London in recent years I’ve only seen Awake. Maybe Watchtower is American or only in Kingdom halls?
they clarified that it was 11 tribes and one “lost tribe”
As far as I’m aware there are 10 lost tribes. Only Judah and Benjamin were not regarded as lost. They might have a different view on that of course…
They agreed that it’s the gospel and many people weren’t good enough Christians
They don’t see the “vast multitude” (who are believers besides the 144,000) as having a bad deal in any way. They get to live on the restored earth which is basically Eden paradise. That’s why all their magazines / tracts have pictures of an idyllic life in a park / nature type setting
Yes, it’s a general feature though I’ve rarely come across evangelical groups that go as far as to make public proclamations of their predictions like Jehovah’s witnesses did (some do, no doubt)
Amusingly it seems the JWs might have only survived because around 1886 it accidentally predicted 1914 would be the end of the world and the beginning of the favouring of the Jews (WWI and II culminated in the re-founding of Israel)
They re-engineered the text of the prophecy to better match the outbreak of world war (unsurprisingly). But that, together with the founding of Israel in 1948 are things they still point back to as “proofs”