Whats up, first off, congrats on all that you have accomplished so far!
you say your body is very resilient right now, which is very true. if you want o get more results, you have to increase your weights, increase your reps, so your body has to adapt more.
30 mins 3 times a week on the eliptical is good, but again, your body adjusts quickly. start going for longer if possible. maybe add 5 minutes every week or something. just find something that works for you, you know.
good luck!