Assuming these are flow lines, not a large gas transmission line? Delago is a front for a bigger operator who is working on a down-dip Austin Chalk play in your area. These are likely to be very gassy wells with minimal liquids. The flow lines are necessary to get gas to market and that seems like a reasonable price. Pad site damage is pretty standard although I would attempt to negotiate it at a per acre rate e.g. $1500 p/a. Pad sites can be rather large nowadays.
Also, if you are mineral owner it helps to conceptualize the flow line easements as a necessary component of a partnership with the operator. This is an unproven play. To a degree, you want the operator to be successful so that further development occurs. Operators need to make reasonable surface use agreements to facilitate expensive appraisal-well plans.
If you are not a mineral owner (only surface), a company offering a SUA is the equivalent of an olive branch. Your negotiating leverage is capped at the company’s propensity to put up with surface owner demands. The mineral estate is dominant over the surface estate and they have no obligation to offer you a SUA. They would have to pay “comparable damages” which may be more or less than $5000 per pad and $6 per rod. Likely less, and believe me you don’t want to pay legal expenses just to find out.