If there is a large anchor tenant (especially a grocery store) find out if they're exempt from some or all of the common area maintenance (CAM) charges. If the actual expenses are say $3.00/SF based on the total leasable area of the shopping center (say 100,000 square feet) and the 50,000 square foot grocery store negotiates a lease saying they don't have to pay any CAM, you could end up paying the equivalent of $6.00/SF unless the landlord is willing to eat the portion the grocery store should have been paying.
If there's a NNN lease in place though you should be ok as the tenant will be responsible for those expenses.
Also, I would take a look at any cross-access easements which guarantee access to the pad site from the surrounding parking lot/drive aisles of the larger shopping center. That particular pad may not have direct access to a public right-of-way and without a cross-access easement in place the owner of the surrounding parcel could basically cut off vehicle access. Also, that agreement should spell out how maintenance costs are split as you could be receiving the benefit of the surrounding site and would therefore be expected to pay for some of that upkeep (new paving, etc.)