I think 2.5 times still is not going to be enough to make the investment worth while.

Right now the HP values are:

High Tech : 187,500
Advanced 162,500
Standard : 125,000

I think the values should be around

High Tech : 750,000
Advanced 650,000
Standard : 500,000

or some where near that, these PBS systems will take players a very long time to plan and build so i think the HP amounts should reflect that.

we need to keep in mind that these things can be wiped off the map ! unlike current beta terminals if we dont have the proper strength (HP) of the main terminal our PBS networks will fail.