Voted fix it, but easily say scrap it. This year in championship has been frustrating with some very poor decisions, even the ones in our favour, but also refreshing. At least you know what's happening in real time.
Big fixes? My vote goes for
1. time limit on review. As others have said 30s should be enough time if it's 'clear and obvious', 45s at the most.
2. Agree with obvious offsides should be flagged. I get the idea of not doing it, but only time before a serious injury or incident caused by this 'wait until' rule. Maybe have a 5th official watching live stream at the ground to help out (what could possibly go wrong?
)
3. Offsides should be clear offside; let's make it daylight between the offending body part and only it you can score with it (so no hands / arms). The stupid 5mm / toenail decisions make a mockery of the offside rule, the correction for camera angle always looks dodgy. Think about 20 years ago there was a decision to make offside favour the attacking side, so clear daylight would sort of re-establish this intention.
Remember in my youth the standard joke was 'if a women says she likes football, get her to explain the offside rule!' Not sure anyone can honestly explain the offside rule (Which part of the body? Did he make an attempt to play the ball? Which phase of play? Is there a full moon?)
4. Stadium commentary to let crowd know what the question is and how the decision is being reached. Similar to rugby and cricket.
5. Think the idea of it being available for 2 or 3 challenges per team. Make it 2 and a bit like cricket, if it's upheld you get your challenge back.
6. Let them get involved in 2nd yellow card incidents. They can intervene in red cards so why not 2nd yellows?