I ask because the Ingstad BC might even be "worse" than the 88 in the context you are skiing in...
Let me explain-
The Ingstad BC and the 88 may both be XC skis- but their geometry is very different-
The Ingstad BC is FAST man- VERY FAST- MUCH FASTER than the 88.
I LOOOVE the Ingstad BC- and I LOOOVE pointing them downhill- but man- you'd best keep them on a moderate slope if you got XC boots on!

The Ingstad has way more tip rocker, a narrower waist, and less camber than the 88- you point the Ingstad BC straight down a very steep hill and you will hit Ludicrous Speed in a few seconds.
As far as replacing the 88 with a downhill ski-
That really depends on whether you want to primarily downhill ski (and also what the snow is like).
My intuition is suggesting to me this-
You are XC skiing in mountainous terrain- yes?
Many of the descents are very steep and you feel out of control- yes?
Are these steep descents on trails/roads- below tree line?
Whether you end up trying a downhill ski or not- I am thinking that you want/need a Telemark boot...
A note on the FT62-
Yes, it is single cambered, has tip rocker and a lot of sidecut-
BUT- the FT62 is a narrow, torsionally stable rocket that wants to go fast-
I do ski my FT62 with XC boots- but again, I am sticking to moderate slopes with it.
If these descents are very steep- I don't know that you are going to feel more in control with a FT62 and your Alaskas- unless the snow is ideal and you have a short, tight-tuning length...BUT- a short FT62 is going to be VERY slow as a XC ski...
I keep thinking that your answer might be 75mm and a Telemark boot...
And if so- then the Ingstad BC might well be a huge improvement in performance- especially if the typical snow is soft..
Hopefully we are helping you!
