I'm not sure if I know what an EQ basket looks like, but I think you have the right idea there. One thing I have done, which I think has created the result you described, has been to make the riser thicker, with a smaller-diameter hole for airflow (which can be made with a screwdriver). In my experience so far, not only does a small hole provide a smaller area for your load to be easily usable (while also providing considerably less turbulence), but I think it also concentrates the heat right above the hole.
For risers that are fairly thin around the circumference (like the ones to the far left and far right in my picture below), I have made a change in my riser-making process. Instead of rolling a fairly large piece of dough into a long cylinder, I use small (pea-sized) pieces of dough to build the riser, kind of like bricks. It all ends up as one piece after I press everything together real good.
I can't remember, but did you indicate that you have some of the same Aromed problems I had, regarding possible lower temperature conditions than expected?
Here's a picture I just took of some of the risers I've made. Take note of the different center hole sizes. Keep in mind, the ones that used a lot of dough took a lot of time to bake (which is why they are darker).
Yes, I'm still 100% on board for this idea. This modification has changed everything for me.
I really hope you do try it. And if you do it differently than I have, that won't upset me; it'll just give me more ideas.