Gemini did my itinerary 14 days South Island

Kia Ora!

I've got gemini to draft out an itinerary based on what activities i wanna do but would appreciate any feedbacks on feasibility or better options available.

we are a couple looking for a chill, trying not to rush everything kinda trip i guess.

Day 1,2,3
- arrive in the morning and drive to twizel (scenic drive, night stargazing(any great spots to recommend?)
- heli glacier hike and buffer days in the other mornings in case of bad weather
- hooker valley, tasman glacier

Day 4,5,6,7
-Wanaka Skydive + buffer days
-roys peak, wanakatree, Mount Iron Loop Track, Diamond Lake, Rocky Mountain

Day 8,9
-Te Anau
-Milford Cruise & Glowworms

Day 10,11,12
-Queenstown
-Nevis Swing, Glenorchy, Queenstown Hill Track, TSS Earnshaw

Day 13,14,15
-Lake Tekapo, Christchurch & Return in the evening

Gemini was suggesting either 4 nights in Queenstown or Wanaka, but i chose wanaka for that extra buffer day for skydiving, but the comapny did mention if i fail to do it in wanaka they can transfer it to their Queenstown team.

Is this kinda too chill for 14 days? The only road trip we did was in Iceland and it was pretty packed staying in a different place each day.

Any beautiful places im missing?

Any help is greatly appreciated! Thanks in advance!