There is some logging happening just south of Middle Tiger peak that has affected the trail slightly: https://www.issaquahalps.org/articles/2020/5/29/tiger-mountain-trail-tmt-closure-explained
Right now there are two short sections of trail that have basically been replaced by logging road. One of them slightly shortens the route (maybe .1 - see yellow vs. red line). It looks like there is a planned future re-route around this logging area that would shorten the route more significantly (light green line). Not sure when that new trail will open and if it will be "permanent." I'll keep an eye out on that and how it would impact future FKT attempts.