Well that was beacause he trained in the dangai with his father. If you read the manga, you know what his new bankai is like.
What does it matter if he trained in the Dangai? You remarked that Ichigo is stronger than ever which includes his pre-FTG and FTG forms. All I said is that isn't true. He's no where near that level of power
Yeah, I do read it. I also know that we've seen nothing of it.
So far we've seen a fancy blade and a big Getsuga Tenshou. This hardly means anything. The Gotei 13 have been training all this time as well. Byakuya and Kenpachi are undoubtedly stronger than before. Hitsugaya has also been training hard ever since his failure to protect Hinamori. It's also been told, by Kubo, that Hitsugaya has finally completed and fully mastered his Bankai.
Any one of these three could easily match Ichigo in a 1vs1 fight
Ichigo is way overrated in my opinion