So why exactly do you want to increase volume? And how much were you planning to do it? Weight loss is a tricky thing. Best results come from great intensity, or very high volume resistance training, or high intensity running. And diet of course.
As for your novice looks, I would recommend intensity, but lets hear more from that beofre I draw conclusions.
I want to increase volume because I enjoy the endorphine high that comes afterwards and all its benefits. I also would like to lsee if my weight drops a little more without having to change my diet (I love my flintstone steaks). I always go "balls to the wall"
. I don't know any other level of intensity so I can't up that any more (dropping workouts won't help increase intensity enough to negate the diminishing returns). Though I do train without a spotter so I always leave enough gas not to drop the bar on myself... barely.
When I say increase volume. I mean instead of the 2 day split being done 3 days a week rotated over a fortnight, I will do it 4 days a week.
Say A is Push, B is Pull. Currently the roster looks like this: XAXBXAXXBXAXBX
I mean to change it to: XABXABXXABXABX (each of those was over a fortnight with the first day being a Sunday)
Some lifting days I will have to miss due to travelling for medical appointments but that is every 2nd or more weeks.. more towards maybe every 4-6 weeks.