(1) Against modern Enemy (like US), may be switch blade is a better option, while artillery is not going to help due to enemy's air superiority.I don't think you can replace artillery with something like the switchblade. You gotta consider Artillery to me used on larger scale conflicts while a switch blade would be more tactical level, while artillery would be used on a strategic level for large brigade level offensives.
(2) There is another option, which is known as "precision guided artillery munition".
What do you think about it (price? effectiveness vs switch blade vs normal munition? ....)