Default concerned

im a little shaky about my new htc m8. i did a lot of android flashing/modding on the xperia arc s before. i have a few questions

1. by default my phone is s-off is that a problem? (successfully upgraded to 4.4.2 build: via OTA)

2. if i unlock bootloader but keep stock recovery+kernel will i get the android L ota when it comes out?

3. what i mainly wanna do is flash stock build 2.22.401.4 and root to remove some useless apps like play music, chrome(because htc already has apps for these) and other bloatware

provided i do no.3, will i get OTA?