Terrible Form is a style merit that lets you gain a modification, then a technology, then a propulsion and finally an extra process.
It seems designed this way to limit early access to the more powerful propulsions and processes.
Advanced form let's you swap a modification or tech, for a propulsion/process. This balances out as you lose acres to one form aspect and have to spend a merit.
But at two points total you can get a propulsion or process, by combining the two, and circumventing the latter style merit tiers.
Is this an acceptable use of the two merits!? Does that follow rules as intended?