I had my attack and defence style locked before the update...After the 2.0 update the obby maul was stuck on the strength attack style and not gaining ANY exp besides HP.
I could not switch it back to "defensive attack style" which gains strength exp while using the maul...
If you unlock your stats and use the strength style you would prolly gain defence exp or attack exp.
Don't want any obby maulers to get an unexpected defence\attack level due to this... so there ya go.
I hope that wasn't confusing lol