Honestly I'd just like to see the Titan's period of vulnerability reduced and the risk of building a titan increased(greater consequences to building one and letting it die)
perhaps something like:
-increase amount of experience required for each level up by 50%
-increase exp granted for killing enemy titans by 50%
-reduce the damage of ranks 1 & 2 of non level titan AoE damage abilities(for examples Eradica's Chastic burst could drop from 500/700/900/1100 to 350/600/850/1100 and similar adjustments to other strong early game titan AoE)
If titans didn't level so fast and did less AoE damage out of the gate, they would have a much longer period in which they are level 1-2 and still vulnerable to frigates. This would mean that rushing a titan would be less of a no-brainer as the guy that's building a fleet will likely be able to kill said titan if it has no supporting fleet before it grows.
titans are just IMO way too snowbally now and for the benefit they give don't present much of a risk since they grow out of their vulnerable stage extremely quickly.