You can change the platform depth, width, and seat height. You can change the size of the seat. You can add pads until it feels like you're sitting on air. You can change everything you'd like about a hang on stand, and you will not be able to impact the single biggest factor in comfort in using a hang on - You can't adjust the angle or distance of the tree from the top/back of the seat.
I've hunted almost exclusively in a JX3 on a ring of squirrel steps since I got the first proto in 2018. At no point did I compromise comfort or maneuverability. The system can be dialed in to about 125% the weight of a normal close to truck saddle setup, and 105% of a trekking deep setup.
I say both of these things as a person who still owns hang ons, and on occasion has a need for them.
But they're both statements of fact, not opinions.