I can tell you that this suggestion was made in the form of resolutions presented by three provinces, on three different occasions, at the Uniform Law Conference of Canada. Prosecutors explained that the offence "possessing break-in instruments" was often committed at the same time as the break and enter into a place other than a dwelling house, which may be a summary conviction offence. Because it is a hybrid offence, it can be prosecuted by way of indictment or summary conviction.
Because this offence of possessing break-in instruments could not up until now be prosecuted by indictment, Crown prosecutors who could not hold two separate trials and wanted to deal with both offences at the same time were forced to proceed by indictment, a more complex procedure. It requires a preliminary inquiry, perhaps a trial before jury, etc.
We have often heard that these offences could be prosecuted by way of summary conviction and that it would be preferable to deal with them at the same time.