I don't really understand why you are against it. Why not grant the player the freedom to choose his own play style rather than force your own ideals upon him.
"his own play style" is a really fuzzy reason for lowering any limits. as admin you get everything declared as personal play style by players, including blocking other companies, building a station that consists of 10 tiles for the actual station and 20 tiles to cheat the coverage area higher, running a crash train to destroy vehicles of opponents...
where do you draw the line? you think it should be possible to terraform at least half area of max station size, the next person thinks it should be possible to remove small hills and bury small lakes, another one has been leveling all the land 20 tiles left and right from all his tracks because he thinks it looks nice ("yes Mr. Admin, i've been building like that for the last 10 years, can't make me change now!!!!!!!").
you say "common, now your going overboard" and i say "your proposal is already exaggerated, go around that lake and take the increased distance penalty as all players have to". at least it's always fair, all other players have the same limit - what varies is only how well players are able to adapt to it.
when i raise the limit i will on the other hand limit the play style of players that have learned to play with the landscape: if their competitors just buries a lake in their way it means they got a disadvantage if they don't. so they're kind of forced to also play against the landscape instead of playing with it (at least when they want to win).
I also only suggested to double the current value which would then be 100. Imo 200 is probably too much.
i don't think you have understood yet how the limit works.
there is two settings, one for the burst you can do within one action that at the same time also defines the maximum in your "pool" of tiles allowed to get terraformed. and there is another one that defines how quickly that pool regenerates (currently: 1 tile per day).
my suggestion was to increase only the burst but leave the regeneration as it is. that means you have a higher initial terraform allowance and you can terraform a 4 tiles wider area at once. however, it also uses up your pool of terraforming actions faster, so in total the map cannot be terraformed much more than before (only for those that wait a long time between doing big terraforms). what it changes is that you can make the area for your full station in one step.
maybe the easiest would be if you imagine it as some kind of an energy bar that slowly regenerates. and what we can configure is
1a) the maxium capacity of that energy bar (in terraformed/tiles)
1b) linked with capacity: the maximum amount of tiles you can terraform in one burst
2) how fast that energy bar regenerates
right now we got a maximum capacity of 50 tiles and regenerate 1 tile per game day to that energy. after 50 days regeneration stops because the energy bar is full again.
maybe now you can imagine a bit better what it would mean to raise it to 200 (but leave regeneration rate the same). effectively it does
not mean you can terraform 4 times more tiles, maybe not even doubled, but that's not easy to calculate as it depends on how the player uses it.