I didn't spot where Rachel placed her hand during the gym scene but I did notice how happy they were especially in front of all those they shared scenes with. They are so gorgeous together, passion just oozing out and the love that they feel for each other is truly genuine.
As for Tachel having no purpose on the show I totally disagree. They have plenty of storylines left to cover and plenty of purpose. There are so many avenues that this gorgeous couple can explore if only the writers open their hearts and minds to the endless possibilities.
I don't want them to sail into the sunset just yet. I would like them to stay for a while longer and to explore the various friendships especially with Miles, Martha, Leah, Roman, Alf and Irene, plus some more scenes with the Austin family would also be a bonus.