Your point about riding tech bindings all season on the EC is valid. I can see how icey chunder could become an issue. The bindings don't have any float in them, unlike a traditional binding
But I rode Ions inbounds all last season, all sorts of marginal conditions. no pre release issues. ( however this was Interior BC). A friend of mine did too, we were both really surprised at how well they held up to everything.
Trekkers are called day wreckers for a reason ( que the new style trekker debate) ... I can never support anyone to go that route. Plus touring on trekkers is an awful experience due to the height and flex.
Other options include;
Buy a pair of marker wardens, they are compatible with tech boots, ride then in the east and then throw a pin setup on your skis when you get here.
Buy tech boots with swappable soles, and just use your old binders for now.