I think trying the 2" soft is a reasonable next step. The 3" may have changed the overall feel of your mattress more than you anticipated, depending on how all the mattress layers and your personal characteristics are interacting. A 2" topper will still add some pressure relief, but it generally lets more of the mattress’s original support and feel come through. Sometimes that ends up being the better balance. Latex can be a bit nuanced. As the ILD goes up, you’re generally going to notice more of the latex’s inherent support and pushback. At the lower ILDs, it still has that characteristic latex resilience, but it can also feel softer and a bit more “squishy,” especially in a thicker 3" layer. How that translates for any one person really depends on the thickness, the mattress underneath, and how much you’re compressing the topper. With a 2" topper, again depending on your body type, sleeping position, and the characteristics of the mattress underneath, you are likely to engage the support layers a little sooner. For some people, that’s actually the sweet spot because it adds just enough pressure relief without masking the support of the mattress. For others, especially if they need a little more immersion for their shoulders or hips, it may not provide quite enough cushioning. Talk about being between a rock and a hard place!
As for feeling like you were going to fall off the bed with the 3" topper, I can actually understand that sensation. You’re sleeping on top of an additional 3" comfort layer, so it’s not surprising that the edge can feel different than the mattress itself. My 3" Talalay topper is 36-38 ILD, so it’s firmer and doesn’t compress as much, but even then I notice there’s less edge support than the mattress alone when I’m getting in or out of bed. The Plank Luxe also has very robust edge support, so that probably minimizes it in my case.
On the wool question, you don’t necessarily have to buy a dedicated wool topper just to see if you like what wool adds. You could simply take a nice wool comforter and place it on top of the mattress under your fitted sheet to test the waters. This one at Marshalls is one of the best values I’ve come across. It’s well made, durable, and if you decide you don’t like sleeping on it, it still makes a great comforter or duvet insert. For a Twin XL, you could just fold it in half.
I actually have this same comforter on my bed as one of my duvets (long story 
), so I’m pretty familiar with it. Wool is remarkably temperature neutral. It helps insulate when it’s cold but is also excellent at regulating heat and moisture, so it stays surprisingly comfortable in the summer as well. Beyond the temperature benefits, it can add just a touch of surface cushioning and help tone down some of latex’s lively, buoyant feel without dramatically changing the support underneath when you use it as a temporary pseudo topper/mattress pad, to test the waters.
Wool won’t feel like another foam layer. It has a way of taking a little of the bounce out of latex while adding a touch of surface cushioning and a more “grounded” feel without dramatically changing the support underneath. It isn’t a night-and-day difference, but sometimes those smaller refinements are all that’s needed. Shephard’s Dream sells wool batting that you could simply lay on top of the latex topper, provided you use a mattress protector, or get a topper cover that would allow for an extra inch of wool to sit on top of the topper inside the cover.
I know this is starting to feel like a high school science project, but mattress tuning often ends up being a process of making one small change at a time until everything comes together. I have a feeling you’ll get there.
Maverick
