Replying to New skies

I have been skiing my whole life but very casually and like 5 times a year until last year I started going off trail and hitting jumps. I went like 40 times last year and will probably hit 40 again this year. So first ski day of the year I was very rusty and had a hard time skiing the crud and powder so I thought new skis would be a good fix. I have skied a lot since then and I am now better at crud and powder but I still feel like my skiing has weak spots. I feel like there are plenty of jumps or drops I want to hit that are often times natural features but the run-out is cruddy and steep and I am afraid I will lose it skiing away at those speeds on my skis, I am getting better at skiing in crud when I try to stay centered and have my skis doing less sideways motion and more pointing in the direction they are sliding by keeping more edge angle. I feel like my biggest problem is after a lot of snow when it gets really deep, I have a hard time staying balanced especially on flatter terrain, my tips dive and catch and it's hard for me to stay balanced and not fall on my face. when the same snow gets skied out I also have problems with forward and backward balance. I can tell I am getting better and I was going to get new skis but now I am wondering if I should. I don't want to be the bad skier who skis on really nice skis. I would rather be better on cheaper skis.

I will eventually get new skis but I don't know if I should wait. I know the latest I would get new skis would be like in March.

I have a lot of room for improvement in my skiing and I don't know if it is in part my skis being too short or not wide enough. I am 15 135 lbs and 5'7 about. These skis are Rossi S7.pro 160cm long and 90mm underfoot with reg camber. The skis I am looking at are Atomic Blogs 177cm 110mm underfoot rockered. I ski at Snowbird. 

Should I just wait till I get better and then get new skis?

I am not going to get new skis until I can do smoothe 360's as well. I don't know how long that may take.

Thanks