As for the lack of Mag tubes, the hybrid research path leads to psi gates (which in the current tech tree are at a similar tier as mag tubes), and these help significantly.
I would put psi gates as a tier up from mag tubes.
Mag Propulsion is 2000

Psionics is now 5200
Long before you have the tech researched, let alone have the gates built, terras already have their entire network and bunkers in place due to 75% worker rate from terraform civic that they got a little while back for 1000

By the time you get psi gates, terraformers already have a fully established magtube network, and a fully built economy - edens due to +150% growth rate. and all their fungus is long gone by now. The teraformed civic is a very lethal civic for terraformers. There is absolutley no drawback at all.
Whereas terras must take a 2

penalty for a 1

bonus on fungus tiles where a GOOD fungus tile at this point will offer 1-2

1

and X

(usually 1 or 2 tho) So good tiles are bleh under this civic - remeber my cities are only size 5-ish so maybe 5 hammers per city with this? - a technician is better than that bonus with a genejack factory which isn't hard to get around this time and IMO you should be prioritizing it as a hybrid as it is the only way you will compete in production.
The number of base maintenance is the smaller of the two types of maintenance but is the only real strength to the civic. I would like to see it encourage fungus growth in your territory, and add +2 PV to all cities. I couldn't care less if the

was there or not. maybe give it to field labs or communes instead or something.
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But another distinction between a terras mag tube network vs. psi gates is they hold the advantage to meet you in the field for combat when you are invading and use terrain in their advantage with mag tubes. They get 2 movement in their territory, you get 1 when they are invading you. Deirdre can do this as a hyrid because of her trait promotion walk with the planet but no one else can. An invading army gets +50% defense on the way to your cities. A terra however can take those advantages away from you when you are invading them by proper forest and mag tube placement. And have terrain advantage in both your territory and thiers.
It might be a good idea to let hybrid civic grant walk with the planet to all of your units that are build while in that civic. Or at least put in a way for hybrids and only hybrids to get walk with the planet.
Also, you can already airlift 1 unit per turn at least from the start of the game. I do this with my workers alot before I ever even get psi gates. Is that intended? If so terras have both airlifting and mag tubes for mobilization advantages.
Also if hybrid is beefed up to match terra, biodomes needs more work. But I am thinking more along the lines of science. I don't know, I haven't used it much. I would be interested to hear from someone that has.