A suggestion for a new feature is to have the option to limit an application instance to X cores (the least busy at first detected possibly). I have an application seems to be stable if I limit it to 1 CPU, Process Lasso does that well, but if I run two instances they end up both running on the same core - and this does not help spreading the load.
This feature was finally added BTW, see the 'Instance Balancer': https://bitsum.com/product-update/processlasso-v901/