patch notes 2.4.3

I will first admit i am not a expert on macros.

Now that is out of the way i have noticed two commands that stuck out to me in particular

They are:
/targetenemyplayer
/targetfriendplayer

Again since i do not know much of macors these are all blind guesses on their usage.

/targetenemyplayer
/cast shadowstep
/reset=1 (needed?)
/cast cheapshot

And with you shammy types out there

/targetfriendplayer
/cast chain heal

And last but not least is there a way that you can use /targetenemyplayer to locate a raid marking, for example
/targetenemyplayer "skull"

Is there a way to target skull in general through any macro

last but not least.. am i dreaming and drifting?

There are commands that /targetenemy already. But they will get anything that you can attack, like a hunter's pet, totem, etc. The enemyplayer part is so you only get players not other stuff also. You want a castsequence for multiple spells in a macro, try:
/targetenemyplayer
/castsequence reset=target/combat Shadow Step, Cheap Shot

You can heal anyrandom player (no guarantee who you get if you just /targetfriendplayer), but I find it more useful to heal whoever the mob is beating on. I foucs my main and then my alts use:
/cast [target=focus-target-target] Chain Heal

No, you can not target by raid icon, at all, anyway at all.