It was, I guess, as I came in knowing about 1500 kanji. I basically never read lessons, smashing the “skip” button instead. Last couple of times I mentioned that, a few people mentioned they didn’t even know there is a skip button
The lesson quiz was very good at catching up holes in my knowledge – things I thought I knew, but actually didn’t. Long versus short sounds were common offenders.
Not going to lie, I had to look up the full title. It’s not that bad, though 
中級 intermediate level
日本語 Japanese
文法 grammar
要点 main points
整理 arrangement/organization
→ (lit.) arrangement of main intermediate level Japanese grammar points
ポイント 20 err 20 points? I always thought it was written the other way around, but the publisher begs to differ.
I am le French, indeedly.
TL;DR: since the JLPT does not test conversation, my level there was ~N3 at best at the time. Being able to produce Japanese at N2 should be fine.
I talk too much
Well, I felt the N1 was barely enough for my needs (which is one of the reason I kept trying to improve further, but resources are really hard to come by at the advanced level). It doesn’t help that my skill are completely unbalanced. If I had to put it based on the CEFR (Common European Framework of Reference for Languages), after passing the N1 my level was something like:
listening: B1/B2 (intermediate)
reading: B2/C1 (low advanced)
Which is enough over all to pass. However, production was:
speaking: A2/B1 (low intermediate; only using N4 and maybe some N3 vocab and grammar)
writing: B1 (low intermediate)
In that sense, in terms of daily conversation, I could have been at the same level (and probably was) back at the N3 level. That actually makes sense, actually, considering that’s when I stop going to proper Japanese classes, which forced me to speak and write. As both an introvert and a book worm, I instantly ditched the things that I had no use for 
Things got better with time, as my work is technically in Japanese, so I have to do some regular output, but it’s not great. The most progress I have made over the past 3 years is in reading (the thing that obviously needed it the least). Thanks to WK ironing out the kinks, and the metric ton of reading I have done recently, I feel I am squarely in the C1 zone.
Well, daily life, including work, already involves Japanese. But yeah, I would need something that forces me to go beyond my comfort zone.