NWF_Renim said:
Is there a need to differentiate War of Underworld from Alicization to warrant having its own tag?
To answer the question, War of Underworld should begins at vol. 15 and ends at vol. 18.
Following is spoilers (I'm detailling some differencies between the two parts of Alicization) :
At vol. 16, Asuna_(Stacia) appears. Leafa_(Terraria) and Sinon_(Solus) follow her in vol. 17. Other than that, Kirito is one-armed from vol. 15 to vol. 18. And the ennemies change from Quinella & the Integrity Knights, to Vecta and his underlings. Other than that, I don't think there are any differences.
However, I'm not even sure that Alicization should have its own tag as it only means "from vol.9 to vol.18 of the light novel". It's true that the main cast change from Kirito, Asuna_(sao) (and the usual crew) to Kirito, Eugeo and Alice_Schuberg. But it's not really different from creating an hypothetical tag for One Piece - Alabasta because of Nefertari_Vivi.
Also, that would means tagging the novel illustrations (for example post #3479004) with those tags, based on a posterior division from the TV-cours.
Another point I would to raise is about sword_art_online:_code_register and sword_art_online:_memory_defrag. From what I understand, they are both derivative gatcha-games with a lot of illustrations (and Memory Defrag re-using those of Code Register). Maybe we should fuse them, and tag the various outfit (for exemple some sword_art_online bikini_armor) with it.
Finally, with the previsible raise of Asuna_(Stacia), Leafa_(Terraria) and Sinon_(Solus), I would also like to ask for a clarification about how we should also tag them with Asuna_(sao), Leafa and Sinon. It will be quite a mess with four variations for Asuna (SAO, Titania, ALO, Stacia) and five for Sinon (GGO, ALO, Solus, HF + her civilian identity).