This instruction will only cause more confusion, there is absolutely nothing wrong with th phraseology as is.
If you are instructed to climb by ATC, that means now, without stopping off at any levels on the way, unl;ess this has been reiterated n the climb clearance. The instruction cancels the previous clearance, be that a previous climb instruction or a SID.
I find it incredible that some posters on here can correctly grasp the idea that if you are given radar vectors whilst performing a SID, these vectors mean that you have been taken off the SID i.e. you can disregard the SID level restrictinos, yet do not understand that if you are given a climb above the SID level, this does the same.
SIDS are designed for many reasons, deconfliction from other routes is a major reason when you have SIDS with altitude restrictions. Taking someone off the SID route means these altitude restrictions are no longer effective...
Similarly when told to climb, you climb now! ATC should not give a conditional climb clearance as this is dangerous.. therefore a climb instruction without any level restrictions added to it means climb continuously to the given level.
If in doubt - ask, however this new procedure and phraseology will only cause more confusion. The system worked previously, so why fix it... it certainly isn't an improvement.