Yeah. Someone said it'd be tedious to walk through that map (was it you?), but I believe otherwise: at least for me, the experience of having to navigate and get through a difficult, narrow-pathed route while having to deal with trainers and wild battles would be awesome. No more boring 50k tile wide paths like Nintendo's with some grass you can easily avoid.
My main goal is to please myself when mapping, unload my inspiration and make something, not follow some -permit me- stupid rules. That would only hinder my creations. If you're an artist and you map as well, you'd know what I mean.
I do however like to have not even one tile mistake in the map and those you pointed out were intentional, merely because after ALL the block making (I always fill my secondary tileset up to 384 blocks) I cbf'ed to add more.
Yeah the playability is nothing major, because the advantage it has is that people have to walk through the map a bit slower, which means that they spend more time looking at the details you put in your map
To my defence, I'll say that I didn't make this map to be playable (although it WILL be in the hack). As for the minor mistakes (such as the sign placement and the puddle palette), I like it that way, so it's staying that way ^^