If you liked book one you'll be very happy with this, as it's a lot more of the same. There is a rough hinting at a plot but it's still too vague to call this anything more than a light, low stakes, power fantasy adventure book, to add to the ever growing pile of such titles. That said it isn't a bad one by the genre's standard, just fairly mundane and generic.
This one split into three sections with Syl's changing form and thus goals which added some welcome variety, and I was happy to find some time skips starting to appear, which was very welcome.
Some of the worlds believability started cracking in this one for me, the level ups seem absolutely arbitrary, the value of things is hand waved away as 'slimes don't care about currency' and everything always turns positive with no cost - there was at least one instance of a mess-up that cost Syl some time, but ultimately lead to learning and gaining a lot more so not really a cost, more a setback.