Dare I ask how this spell gained your enmity?
Orbius is pretty mechanically broken. By itself, unaltered, it's not bad--because it's not
good at anything. When you take that effect and modify it, as they suggest you do in the DFRPG, it becomes a terrifying monster.
The problem is, it takes something that's not broken (the grapple rules) and breaks them in a subtle way. The break isn't obvious in the example as-given.
Basically, a grapple is OK because it deprives a character of most of their options at the cost of some specific set-up on the part of another player and follows it up with continued wasted actions by
both players. When you use magic and a duration to achieve it, the primary player no longer needs to spend his actions maintaining it and can even add Area to it, effectively depriving a large number of characters their actions for extended periods at no additional action expenditure by the caster.