These items would mean major improvements of my game-play and/or map-making experience.
• improve AI's track-laying algorithm (CJNyfalt, milo) [30%,C,weeks] - May require scripted AI
• improve AI's business sense (Grandma Ruth) [30%,C,days] - May require scripted AI
• optionally specify goals for AI in scenario (milo) [20%,C,weeks] - Requires scripted AI
• prevent AIs from reusing logos (milo, davey917) [30%,C,hours] - Is it only the 'keystone' that gets reused?
• event particle source and town creation/destruction (milo) [40%,C,days]
• split track-laying rights from train-running or industry-buying/building (HighVoltage, davey917) [30%,C,weeks] - Requires several new events and possibly more scenario file storage
• support express traffic to/from warehouses and ports (milo) [90%,C,hours]
• support 'all except' consists (Steve) [40%,C,weeks]
• fix railbed and rail-connection graphics (JSS, dj) [70%,AC,days] - Lower bed, maybe fix joint mitering, maybe redraw railbed texture
• support bridge upgrades (ExpressWorld) [30%,C,weeks]
• add math expressions to events (JSS, Wolverine@MSU, Grandma Ruth, davey917, milo) [30%,C,days] - Requires script support
• fix event display in debug window for long scenarios (milo) [30%,C,days]