Granted, this problem exists for all undercover missions, at least at first.
I have found essentially all undercover missions relatively easy with SH if you make best use of cover of buildings, darkness, flares, smoke grenades and/or such equipment. Some spawn locations may be tricky, however and in some cases you may want to abort if you want to play it safe. Of course, until you have dogs and motion scanners the risks are greater (but at that point, you have probably not been all that addicted to your superagents either).
None of this helps or applies to the graveyard, where there is essentially zero cover and none of the other techniques work.
Obviously, if you try to play the undercover missions the same way as everything else (especially in the beginning), you'll be wrecked.
I've actually liked various special missions a lot as they force you to adapt to different playstyles and play in a careful fashion.
FWIW, I didn't write the original post as a complaint, but rather just as something to consider. Personally, I delayed this specific mission at least 6 months until I went for it (for example, waited to obtain some laser pistols and SMGs). It's manageable, at least with some luck, but much more difficult than many other missions. Not sure if that has been intentional.