Both force bubble and detention field are useful but very situational.
As for detention field, it be modified to work like one of the incarnates, half toggle so you can deactivate early but if left it will run its time and auto deactivate for cd.
As for force bubble, if played right, can be very effective in crowd control and to protect ranged players from melee attacks, so I personally would rather this not be changed, an endurance reduction would hurt though.
Problem that I find with both sonic and force field is if the team cannot fully rely on this as their only defence as they cannot replace lost HP during combat and you still need another player who as access to team heals. If both sonic and force field could gain access to either heals or regen, to me would help increase their viability but at the same time, this could also cause balance issues if they can replace dedicated healers.