Is there any sort of proposed lower limit to the bonus points? Surely that’ll encourage people who are borderline honours / pass ability to stick with the honours scheme because "sure even if I get a D1/D2 I’ll still get a few extra points". They’ll go on to college with big gaps in their maths. Or worse, even fail at the leaving cert level.
People who want to do science / maths related courses in college are going to do them anyhow regardless of bonus points.
Instead of bonus points, how about actually giving schools money (and a flying car for all! :P) so that they can do all their science experiments? I did Physics and Chemistry for my Leaving. We did the parallelogram law in Physics and Chemistry we did a few titrations. All the other experiments were "lets pretend" because the school hadn’t the money.