I love the area around Interlaken but we don't come there often as we live in Schaffhausen and it is quite far away from us. However we've been there a couple of times already. This looks like a great hiking route. You got some beautiful view and saw so many Capricorns! Lucky you! We go to the Alps almost every weekend but never seen even one of them! :(
Cable cars are crazy expensive here but there are also many routes that are doable without them :)
Thank you for sharing and have a good day!