I'll summarize your post with a single answer, "No", and then tell you why not.
1) Indirect fire was a function in TT which means that it should be a viable strategy in the game. The problem with how TT differs from in-game is that, in TT, you had such an insane reduction in chance to hit that it wasn't viable to use it. That was mainly because you had to have a spotter that did nothing that turn just to give you the ability to fire indirectly and then you took a -8 chance to hit on top of every other modifier (i.e., your movement, your target's movement, etc.). So, removing it isn't really an option that should be considered.
2) LRM velocity should be nudged up to match that of Streaks, probably, but the bigger thing is that LRMs, while usable indirectly, are absolutely horrid as direct fire weapons because the arc that is utilized is that extreme. Why am I firing way up in the air if my target is out in the open? Why does the angle of my missiles change the closer my target is to me when they should just the same arc?
If Artemis only works when I have direct LOS to my target and thusly makes it quicker for me to lock and also has the benefit of making my clusters tighter, why shouldn't it also make my trajectory flatter? A slight bump in missile speed and a slight increase in range of AMS is likely justified but the issue is more on how the weapon acts. Change that and you've got a better weapon system that doesn't get stronger when fired indirectly.
3) Finally, WHY aren't LRMs set to target bones like Streak missiles? Both are guided and require locks. It is just as easy to apply the "miss" factor to bone targeted LRMs as it is to do so with the benefits of NARC, TAG, and Artemis. Change that up and now we're talking about LRMs landing correctly instead of having a flight fired from a target in front of me hitting me in the face only to tear off my rear armor. It makes no sense.
PS> AMS also can shoot down NARCs, which are already hard to land, so let's not make the heavy SOBs worse. It is alreay strange that they deal damage to me when the ammo explodes but don't deal damage to my target. TT shenanigans!
Edited by Trauglodyte, 23 January 2016 - 12:23 PM.