@seqouia mcdowell : have you checked the logs from the time just post-update to determine why the system disabled the synaptics touchpad client? Find that most answers can be found within the logs when looking into them as they will often contain the information or some hint as to why an issue occurs (presuming that you have not lost your ability to see a screen of course).
It is frustrating when an issue occurs, but unlike a proprietary system, what makes Linux helpful is the ability to debug at a system level the occurrence of most issues with a little determination and help from others at times. Would suggest that if the logs are available, that they are the only source of information that can be of any value, otherwise no one will be able to assist with this issue at all.
The reason is not because no one wishes to help, it is simply that the facts are not present to make intelligent determination of cause. If there were some log information to review, errors might present themselves that could show the root cause and ways to resolve and avoid in future. Anything else is speculative and not likely to resolve your root question and leads you to further frustration and becomes a self-fulfilling finality of "too hard" and "doesn't work".
If you search the /var/log/apt/history.log file, you should be able to locate the date and time of the update in question. You should then be able to locate the syslog (/var/log/syslog) file that contains the output from the time of the update to determine what occurred at that date and time, or at least add the appropriate output here for examination, where a determination can be made to address the root question.
HTH. Have a nice day. :)