well-made deck, not much changes i would make, but i would add
Sangan- most of ur monsters are searchable by him due to their low attacks. he can help you search all your tuners to make brain and mind control live.
foolish burial- good to send level eater, plague, treeborn frog, dandylion, spore for instant use. esp foolish dandy summon debris to instant trishula.
Spinned guilman - good to use with diva, you may wan to consider another diva just to make this card live. personally feel this card is good with diva as it makes an instant synchro. you may find yourself in a position where you need an instant catastr or andriod yet all you can do is set up another diva in defence.
Instant fusion - just a tech card to bring out another monster to help you synchro. what i like to do is bring out a diva and use instant fusion to bring out deep sea shark to synchro gungnir.
you may also want to consider another debris dragon over junk synchron as what junk synchron can bring out can also be brought out by debris dragon or has its own summoning condition(e.g treeborn, level eater). debris imo brings out better synchros. but just my 2 cents, any changes are up to your own playstyle.