The other option would be to change the block time to 2 minutes.
I'm not sure why that wasn't discussed more.
Because that will cause more frequent orphan blocks. It has been said in this kind of threads before.
what about dynamic block size increase or lightining network? they seems a better proposal(they aren't the same thign right?), but i'm not an expert here
I haven't heard about the lightning network before. The dynamic block size seems vulnerable to manipulation, just as if there was no limit at all.