My short experience with the new 115mm lens:
I own the ATX eyepiece with the 65mm and 95mm lens modules. Great combination. But when I heard of the new superlative 115mm module I could not resist and ordered one copy from a reputable dealer. If the 115 was a great step forward I would sell my 95 and use a 65/115 combo henceforth. The parcel arrived two days ago and I sent it back last night after two days of testing in various situations.
Why?
Well, the 115 is markedly brighter than my 95 and resolves a tad better, especially in dim light. Regarding CA they are nearly equal with a slight edge to the 115. (BTW, I am very pleased with my 95 copy in general.) But I expected the difference in weight and size - about 750 g and 1.5 cm in lenght - less extreme. In reality, the 115 is a monster! Fat, heavy, cloddish! Although I am tall, not too old, quite athletic and willing to suffer I could not imagine to carry such a mammoth several hours in the field, not to mention the then required heavier tripod and head. While I struggled with the 115 in our garden, my sweet-natured, diplomatic wife remarked: "It seems to be the perfect solution for stationary observations, dear." That's it. The best optical performance I have ever seen in a scope, easily up to 70x. But an ATX 30-70x115 is not a FIELD scope anymore, at least not for me. And the 95 is only slightly inferior IMHO. Hence I stick to my proved and tested 65/95 combination. Money saved. Doubts dispelled. Relief!