There is no need to change the physical strat, just make it worth more.
I'm not sure what you mean by 'make it worth more'. Just make it worth more perks? Or make it have a bigger impact on game-play?
More perks may increase traffic to strat, but that often means flak, 163s, and flying deep into enemy territory. Unless it was much more valuable than town centers, it's still safer to hit some towns.
If you mean bigger game-play impact, I disagree. If that was the case, and people cared about the status of strat, we wouldn't see more defenders or really much more attacks. When those big raids hit strat now and people suddenly care about them for a few minutes, it's still much faster and easier to up a goon and resupply strat rather than defend against the attackers. Sometimes the strat is already back up by the time you land and the goons have made multiple runs and probably gained more perks than you did.