For ANH...
I'll suggest things for mood, alusions, dialog and costume and sets in a post for the entire OT.
These are just offhand, small suggestions.
-Luke and the hopper--there are opportunities for dropping more exposition about history, prior relationship between Leia and the droids and twins on the ship--3PO auto-memory wipe might be a running gag *grabs head* "Oh! It's happened again."-- STs might have more dialogue, funny but menacing (troopers) throughout film (DS "have you..")-- a living snake dragon, practical? winds down a rail track?---See if sequence of escape pod to the farm can be tightened, (they don't seperate? only threaten to?)---argument about hopper LS/UO no Biggs---impoff drops expo about X-wings being the only hyperdrive fighters and local system defenses---Luke carries light sabre then drops it while falling to his knees (this one's informed by PT)---Mos Eisly is the capitol, Tat only has a few million inhabitants? Jabba rules from the slime planet of Hutta (capitol city a slimey Chicago?)---separate because they might be sensed by Vader on DS, two force weilders can't hide themselves well when together---Vader senses something from Leia---detention block "Would you prefer to crawl back into your cell, highness?" from novel---"Into the chute, flyboys"---More 'JAWS' in garbage compactor, Han "Everybody just calm dowwAAHH!!" everybody yelps as goofy but terrifying and toothy head pops up---New DS like a small, industrial, airless coruscant?(PT), crater is the inactive HS exhaust outlet?? Beams just rise out of surface??? DS is to be Emperor's new ride, like "flagship" ---imps find base on their own, no tracker---Leia begs for a different planet not her own????;/---Vader stunt mask tinted transparent---duel something between ANH and ROTS over chasms---Luke rescues Ben???? injured or not????---Leia calculates tragectory of DS--- "Your reward lies on Yavin. It will last as long as they do."---Luke makes two squadron friends in briefing, one lives---Leia's home world the target??? like GL original???---Ben in sick bay/ coaches Luke through Force?--- Ben is wing leader shot by Vader? lives or doesn't?--- Each squadron has control officer and tech support officer at a holo console. control O seated, she sounds off during roll call, get to know her a little, helps fighters?--- Short hyper jump to DS so all fighters are X-wings--- Ben over one shoulder and 3PO or General of Yavin and Hoth over other shoulder?--- Chewie gets a med- oh wait, nvm :)
Edit: Might make the jamming of the targeting comps a greater concern during the runs. It keeps throwing off slightly. Luke gets frustrated with it as well as coached by Ben.