Would it make sense to send better robotic analyzers there than to bring the samples back here? Fighting gravity and kilometers involves spending many billions on return; a lesser amount could be spent on surface activities.
The issue is the size of some of these analysers. For instance, a synchrotron, which is required to non-destructively generate nanometer-scale 3d images of the samples are 3-4 times the size of a football stadium
An AFM can get atomic resolution imagery and is not the size of a football stadium.
An AFM is completely useless to identify the chemical elements, protein or crystalline structure inside a sample.
There are tools used in UHV surface science labs for that, in the same head as a AFM/STM.
We would need to move people and cargo back and forth eventually, so best to get started on that ASAP. Not to mention sample return has been done from the Moon & asteroid to great success, its a proven concept on how to get the most from the samples.