You lose information when DST kicks in - which is not great. It is trivial to convert to any timezone so there is little point in logging in anything but UTC and keeps everything consistent. Especially when comparing dates from servers in different timezones.
Your battery drains more the more you activity use the device. Shocking…
If it is your phone just uninstall those apps, then you cannot use them. If the devices main point is those apps like gaming on the switch what do you expect? I think the only real problem here is the switch’s lack of customizability so you have no trade off between game quality and battery life like you can on something like the steam deck.