Targetmasters, much like many other Binary-Bonding gimicks and unlike Headmasters, are fairly inoffensive gimmicks. If you lose the partner then you've only lost a weapon. And being all 5mm post weapons, you can easily substitute it. The core robot remains the same. Same with Powermasters, Breastmasters etc. - the core Transformer remains in tact and functional. Headmasters are the worst because their robot modes are useless without heads.
Nearly as bad are Brainmasters/Motorvators who of course are faceless without their partners. I suppose they can still be serviceable robots if you like your Transformers looking like freaking Ring Wraiths.
