I get distracted rather easily. So I always forget to change what I'm tracking to match what I'm killing to get the benefit from the SV talent Improved Tracking (5% bonus to non periodic damage to enemies of the tracked type).
What I'd like is a mod that would display a small warning rectangle or square close to my target's unit frame that turns red when it's not of the same kind as what I'm tracking and I could track it. Perhaps the warning notice can be moved around the screen so users can choose where to put it.
For example, if I have Track Humanoids and I target Magmadar, next to his unit frame I'd get a small warning to remind me to switch to Beast Tracking. However this would not show if I'm tracking something Non-specified (like AQ bugs) or mechanicals.