As an aviator I use Windy when I am en route. It is NOT handy to have a sliding scale to select upper winds.
Can you change selection in sliding scale up to FL260 or FL280, thereafter a selector with 1000 feet increments?
Then a decision to climb or descend NOW or postpone the altitude change by compairing winds is easier. Also significant WX charts and windcharts of big meteo centres work this way...
Thanks, waiting for your reply.