almost 4 years ago - Shurenai - Direct link
A17 was a bit of transitionary step, A lot of placeholder systems were nixed from A16, but had not yet had their new and intended replacements fully fleshed out and implemented. There were a lot of little inconsistencies and missing bits and missing steps. So it's not particularly surprising that it felt a bit 'off' to peeps.

A18 took what A17 started and expanded upon it considerably; As A19 did with A18, and A20 likely will with A19.