Magog
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I think the meaning behind what was said about TE is clear: the emphasis on "grinding" means that there's nothing for newcomers to do here. And indeed, when the focus is on complex strategies, and if you fail to execute them, you don't even get out of the starting zone, and there's nothing to gain, there's not even a glimpse of interesting gameplay in that case. Meanwhile, players of all levels should be able to enjoy a full-fledged game, not just those who have mastered the art of skillfully controlling weak units (weak because of the AI).
In short, I think it's about a high barrier to entry and the fact that the main skill in the game is not demonstrated in the aspect that is interesting.
This is what I mean. And somewhere above, it was also mentioned (or in the video) that they don't want to force people to learn everything from scratch, because EVERYTHING has been reworked in TE. They wanted to make a minimum number of changes so that they could be reviewed quickly and understand what's what and how to play.
P - barrier to entry.