Not only easier, but also highly desirable.
Most of the modders I have talked with say it's highly undesirable.
Base real estate is one of the last remaining, if not THE last remaining, limited resource in the engine. It's definitely considered a feature, not a flaw.
In fact, every single xcom and xcom-like game so far had limited base space (or equivalent)... each and every one of them could have decided to make it unlimited... but each and every one one them decided NOT to make it unlimited. For a reason.
If I made it unlimited, I would take a very important tool away from the modders. And I just can't do that to them, can I.
Instead of exponentially growing everything, and playing xcom like slot machines... limited base space enables much deeper strategic decision making and promotes using a brain instead of mindlessly clicking the up-arrow button.
That said, if you want unlimited exponential growth, you can still do that, already today. We have added several features (like facility upgrades, etc.) which enable you to scale indefinitely. There's nothing stopping you from making radar covering entire globe, hangars holding dozens of craft at once, barracks holding thousands of troops, labs/shops for a million scientists if you want... and if you still think you don't have enough space, then create a bloody uber-facility, which provides all imaginable services and a million of each storage type. Job done, all your megalomaniac desires satisfied.