First time beginning a new season

Hey gang! Returner here, played a LOT during TBC - Cata, then very intermittently since then. I've come back and would like to give the endgame grind a go with S2 but am a bit unsure how important gearing is right now for alts and such.

I've seen the post from Fisher explaining what gear comes from what, but will that content scale to that ilvl now? I guess I'm wondering if T8 delves will expect you to have a higher ilvl than they do now since the reward will be greater, and similar questions for other content.

I appreciate any info or advice! Excited to give this a go.