I guess the view of 'the old days' is brought upon by two different things: Change and experience.
Back in the day, we were all nubs. None of us knew exactly what we were doing. Every game was a source of discovery and amazing stories. Everything was new. Then we started getting better and better, forming routes and strategies, getting better at PvP. Then every game became similar, and you learned less and less every time. The game became less of an experience.
Changes also brought small deviations from the way things were. They made it easier to survive, though our experience also made it easier to survive. More maps came out, easily conquered and routed by us. Now the Hub and swarms of new players to massive amounts of servers have made MCSG quite the popular party.
The only way to 'bring back the old days' is to wipe your mind, forget about the old days, forget about how pro you are, and to play like you're a noob once again. Discover new things about the maps on your own. Get off the beaten path like you used to. Get lost. Your enjoyment and your nostalgia will skyrocket. It'll become quite the experience yet again.