Well browns are not that tactile as I wish them to be, that's for sure, I don't bottom out often, and don't really like linear switches. I'm considering zealios for my future board, but have not really decided yet. Will try a ballpoint spring later today then
Heavier springs will not make them more tactile. It will make them less. The resistance of a switch is caused by 2 factors. The spring, and the interaction between the stem and the leaf contacts. The spring is linear always. The force between the stem and contacts changes over the lengths of the press due the shape of the stem and is what causes the tactile feeling. Using a heavier spring won't change the shape of the stem. It will add additional force to the whole of the switch meaning stem/contact force is proportionally smaller. In short the force of a stronger spring drowns out the tactile feed back force.
The way to get more tactile feed back it to use a stem with a bigger bump on it. So MX Clear, Zealios, Kailh Box switches, Kailh pro purple, Outemu Sky v2.2.
If you are still getting springs, don't use a pen spring. You can buy switch springs of various weights.