Don't be fooled. Level 1 hogs are still effective at TH8.
I see people complaining 24/7 about how hogs level 1 suck and how hog suck now because of the giant bomb update coming soon...but seriously if you use them correctly..IT DOESNT MATTER! Check this out...
How to use Hogs correctly: https://www.youtube.com/watch?v=PCpik-P1NIM
How to anti-hog your base(for opposite folks that believe hogs are OP) : https://www.youtube.com/watch?v=eIB8hbWhtls
EDIT: Since I received some criticism about attacking an under developed th8...I provided an example of the complete destruction of a very established th8. Its all about placement and predicting traps. https://www.youtube.com/watch?v=k-klIHxCtUE