HI - I have a similar back story to smoking. My first smoker was a vertical propane with the trays.
I upgraded to the RT-700 which is essentially now the flagship. I believe you will notice a difference in smoke flavor/strength in the beginning and you may be slightly disappointed however stay with me.
Part of the reason in the beginning of a new grill is a lot of the smoke sticks to the walls of the grill. So the more your grill gets seasoned, the less sticks to the walls and more to the meat. Beyond that, you can try adding more a lot of ways. Is this necessary? To some, yes, to others, no. I think it all depends on the person/tastes.
So when this happened to me, I started researching how to add more smoke flavor to pellet grills. Most says pellet tubes which are cheap. I didn't notice a difference however I will come back to this. Then I went to the
Heavy D diffuser you can put wood in. However, that didn't work too well for me. I still have it but don't use it. Then I tried the Magnum PIG cold smoker which does require drilling a hole into your grill. This does work but at the same kind, kind of takes out the set it and forget it of pellet grills. However, this definitely add more good smoke flavor since the cold smoker used wood/charcoal to create the smoke. However, then I saw someone(coming back to what I said about pellet tubes) adding wood chips with the pellets on smoke tubes. To me, this is the simplest/cheapest way to add more good smoke flavor. What I do is use Royal Oak charcoal pellets in my smoke tube with whatever wood variety I want to use. The wood chips mixed in is the key.
Over time and getting use to the grill, you may not feel a need to do the smoke tube as much. I only do on long cooks and lately, I haven't done that much at all. My Bull is just about 4 years old now and running great.
Good luck with your journey and hope some of this might help you along the way.