I've seen the same video a long ago, it's a good channel.
I do prefer a more narrative experience myself, but I've a few friends who play it and they like it. Sure, they also despise 5e, so I don't know how much I should take into account their opinion haha
That said I think it does have a few good ideas, like having various degree of proficiency or 4 degrees of success, but they still suffer from the neverending amount of bonuses to the roll, necessary magic weapons to keep up with DCs, and a plethora of feats to choose every level that just bore me to death at the sole idea.
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In sum: imo 5e messed up by removing most size differences and thus making races more homogenous = boring.
I totally agree with this, not because it's boring but because it's hard to DM these situations, personally. A medium sized character using a troll club? reducing a character from small to tiny? It would be more helpful to have standardized size rules rather than having every spell specify it's own effect. Probably I've Houseruled the disadvantage for small creatures and forgot about it just because it felt good.