Yeah... So I read through that, and those aren't the "pretty serious issues" you think they are.

To be clear, they aren't inconsequential, but they're not "serious".

For example, complaining about the UX doesn't equate to a security problem. A lower target for the Android API also doesn't equate to security issues. It can be a contributing factor to security, but if your device can't even install a lower API then that's not an issue anyways.

There are some valid points made by the author, but a lot of it is sabre rattling by making those points seem like dangerous security mountains.

Edit: spelling