In order:
economic stability - nothing they'll do will be as significant as global impacts... such as Trump. In a Trump-free world, maybe, but they'll likely restrict UK growth compared to the EU. And the UK has already been behind the EU since Brexit.
NHS - no. Waiting times will at best stagnate, but with a growing population and constant underfunding, things will only get worse. Of course, they may try to pull a fast-one and recategorise stuff so that the
official waiting times seem to drop. They want to reach the target of 92% of patients starting routine treatment within 18 weeks, and have targeted 40,000 additional appointments and procedures a week (2m a year) although this will apparently only be 15% of the additional activity needed to bring waiting times down to the pledged level by the end of the parliament. So, no, although there may be slight improvements from "veeeery long" to "veeery long" waiting times.
Border Security Command - probably this will happen, not sure of the details, and I think they've appointed "the commander of the command", and are now just looking at what they're actually going to do.
Great British Energy - hmmm. Nice idea, in theory. I think they've started the process and are on track. Not sure of timeframes, though.
Antisocial behaviour - perennial issue. How is it measured? How easy will it be to fudge the numbers to make it look as though they're doing something. I can see them introducing some new powers, but whether these will have any effect in reducing numbers, or whether they will just ebb and flow as usual, time will tell.
6,500 new teachers - they still want to do this, and will apparently fund it through the removal of the VAT-exemption on private school fees. But from what I gather this will be inadequate by itself in terms of money raised. But it'll be a start. You could raise the teachers through increasing their pay by 20%, encouraging more into the sector that way, but that would cost upwards of £5bn a year, and would likely cause other public-sector workers to demand similar pay increases, leading to strikes and unrest etc. Otherwise they're stuck with a more focussed approach of trying to retain staff, and build up numbers through reduction in leavers rather than more starters. But, having a number of friends that are teachers, it's not pay that is making them leave, but rather the working conditions, stress, workloads etc. Even with 6,500 new teachers (which is less than one teacher for every 5 schools in the UK), these issues won't disappear.