I wish for all that, plus a pony
This was a Scout program spacecraft. It went over-budget even with cannibalizing a previous mission. Anything more expensive would never have flown.
Also worth noting that a core driller doesn't have the work space of an eight-foot arm. Imagine a core driller landing on bedrock with ice three feet away - people here would be screaming "those idiots at NASA! They shoulda just used the arm!"
The plans for drills on future Mars spacecraft are on rovers. They're also much more expensive.