Try removing all the superfluous default routes.
We have those on I2P already, see tracker2.postman.i2p for example.
You should not torrent over the tor network, but you can torrent over the I2P network. qBittorrent even has experimental I2P support built in.
Yes, for example, syncing on a kernel panic could lead to data corruption (which is why we don’t do that). For the same reason REISUB is not recommended anymore: The default advice for a locked-up system should be SysRq B.