Buff Farsight Orb please!

seriously, the only reason I usually never get blue trinket is because the upgrade is so bad. Upgraded yellow trinket is almost as good as a sightstone (you can have 3/3 wards up at all times), upgraded red trinket almost guarantees you find a ward, upgraded blue trinket gives you... a ward that gets killed instantly if someone is nearby (seriously? an upgrade that punishes you for finding someone with it) or after 60 seconds if no one is. There's almost no reason to upgrade blue trinket... can upgraded blue trinket get buffed to placing a stealth ward at the scanned location for 120 seconds?