I also got a sneak peek at a few other test items but I'm not yet able those (look forward to it in April though!). Here's my thoughts on the three items that I can talk about:
The Caesar dressing offered the expected creamy and tangy profile but also delivered an unexpected spicy kick from roasted green chilies. The heat was fairly mild but noticeable.
They let us sample the chicken version, which fits the Caesar salad theme well but it's also available with steak. I was a big fan of the Chicken Caesar Grilled Stuft Burrito back in the day, so I'd definitely pick one of these up if they make it out of test.