Of course thats casual. That is super casual. I am on mayne 2hrs a night and that is it. I used to raid 6 nights a week 5hr raids. What I do now is beyond casual.Its not. Getting your character stronger is meaningless task in wow. All your power will be absolote next patch and 99% of casuals have no use for that power anyway. Character progression wont hold players interest if there is no reason to progress your character in first place. You just can just press button join LFG/LFR, beat game and quit becouse everything els is nothing but treadmill of ever increasing difficulty and bigger numers. If you really thing people will spend their time chasing artificial numbers just for sake of having them bigger than i have bad news for you.
You know in older expansion specialy preLFR. You wanted to gear your character becouse it allowed you to beat new and harder bosses in completly new raid. There wasnt any easy shortcut for you like LFR to pretty much just bypass all the challenge so players were forced to get better gear in order to beat content. You wanted to get T4 becouse you wanted to beat T5. You wanted to have T5 becouse you wanted to beat T6. You wanted to have T6 in order to beat T6.5.
Now all you can do is just wait get some basic new patch gear, join LFR, beat lfr and quit. Literaly best way to play WoW nowdays is just wait for last patch and when all gating is gone. Than you can join WoW and literaly beats all its content withing 2 weeks without worriyng about gear or any sort of system.
- - - Updated - - -
Thats not casual. Casual is state of mind and difference is made by what goals you set for yourself.