Um, I am not against large tech trees, I am against a lot of meaningless inventions and discoveries. MoO featured different tech at every level and each new ship hull, for example, was a huge step forward. But when you have Laser I then Laser II 3 turns later, then Laser III 3 turns later and each tech hold ONLY new laser version then they become worthless.
For example, MoO tech tree:

Laser cannon - ship weapon
Laser rifle - infantry weapon
Space scanner - allows you to detect ships in hyperspace.
Another tech:
Class I Shield - ship benefit
ECM Jammer - ship system
Masss driver - ship weapon
That is the thing I am talking about. All different bonuses and all important ones.