That DPR system looks like a very interesting proposal which would certainly encourage more people to vote. I had not come across it before.
One reason that we have had the MPs expenses scandal is that it is not really MPs that we vote for at General Elections but parties. So MPs do not feel so answerable to the electors.
This DPR would give MPs more authority in Parliament to hold Govt to account. Possibly some difficulties in appointing MPs to Select Committees but I am sure that could be overcome.