We did this yesterday, northbound. Great route; much more dramatic than the other HA crossings, perhaps helped by the clouds.
Much of the south side of the 'trough' between the two passes is sealed (or at least, metalled) but is still very loose on top. A road-building camp near the Mgoun stream is presumably busy doing the rest. There's a muddy diversion here while they fit or repair the ford, but as we found it, the whole thing can still be done in a car or big bike with road tyres; the gradients are all doable. The ageing 250s managed 3000m with the odd cough.
Took us 3 hours from Alemdoun to Tabant.
Easy nav: just fork right off the road at the end of Alemdoun (cafes, fuel if you ask). Heading south, go east though Tabant village (lots of stores and cafes) a couple of kms, then turn right over the ford and up into the hills.
More info
Late November:
I did it again yesterday, southbound in a 4x4.
Big wide piste still in great shape up to the first pass, down to the stream (ford now finished) and up to the mini pass between the Tizis where the track becomes narrower and stonier but still easy up and over Ait Hamad.
From there lots of tight stony hairpins down to Ameskar where we took the narrow gorge route - well worth it and still used by the Merc buses. You can see how it would fill up during rains.
Top pic - leaving Alemdoun basin
Middle - in the trough looking back at Tizi n’Ait Hamad
Bottom - Aït Bouguemaze valley from Tizi n’Aït Imi